NeuroMetrix Quell 2.0 User manual

© 2018 NeuroMetrix, Inc.
User Manual
2.0

Contents
2 Chapter 1: Pain Relief with Quell 2.0
2 Introduction
3 What's Included
4 Chapter 2: Getting Started & Device Basics
4 Getting Started
4 Charging Battery
4 Checking Battery
5 Downloading the App
5 Inserting the Device
5 Attaching the Electrode
6 Device Placement
7 Chapter 3: Calibration
8 Chapter 4: Pain Relief Therapy
8 Preparing for Therapy Session
8 Starting Therapy Session
8 What Therapy Feels Like
9 Adjusting Intensity During Therapy Session
9 Ending Therapy Session
9 Personalizing Therapy
10 Chapter 5: Overnight Therapy
11 Chapter 6: Electrodes
12 Chapter 7: Skin Care
13 Chapter 8: Using the Mobile App
13 Download the App
13 Creating a Health Cloud Account
14 Settings/Personalization Features
15 Tracking
15 About Me
15 Rate Pain
15 Videos
15 Support
15 Store
16 Chapter 9: Maintenance, Safety, and Service
16 Maintenance
16 Cleaning Device
16 Cleaning Band
16 Device Storage
16 Disposal
16 Limited Warranty
17 APPENDIX A: Indicator Lights
18 APPENDIX B: Troubleshooting
23 APPENDIX C: Frequently Asked Questions
25 APPENDIX D: Alternate Placement Sites
26 APPENDIX E: Technical Specifications
28 APPENDIX F: Precautions and Warnings
29 APPENDIX G: Symbols
30 APPENDIX H: Electromagnetic
Compatibility Declaration
33 APPENDIX I: FCC
34 APPENDIX J: Bluetooth®

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Chapter 1: Pain Relief with Quell 2.0
Introduction
Quell Wearable Pain Relief Technology™ is patented, non-invasive nerve stimulation
system that provides relief from chronic pain. It consists of a device, a wearable band,
an electrode that attaches to the device, and the Quell Relief app to control and
customize your therapy.
Quell provides pain relief by comfortably stimulating sensory nerves in your calf. The
nerves carry neural pulses to the brain that trigger a natural response to block pain
signals in your body.
Pain relief is initiated by using the app on your smartphone. Regular therapy sessions
are 60 minutes. After your first session, therapy will automatically restart every other
hour. You have complete control and can start or end therapy anytime.
The more you use Quell, the better the chance of experiencing relief. For best results,
use Quell daily. We recommend that new users wear Quell for a minimum of 3 therapy
sessions per day (up to 24/7) at a strong, but comfortable intensity for at least the
first 30 days.
If you have any questions about how to use Quell, please call Quell Customer Care at
1-800-204-6577 or email us at [e-mail].
Chapter 1
Pain Relief with Quell® 2.0

Chapter 1: Pain Relief with Quell
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What's Included
Upon receiving your Quell 2.0 Starter Kit, you should inspect its contents to make sure
all of the following are included:
Quell Electrode Pack*
(packaging may vary)
Quell 2.0 Device Quell Band
USB Cable AC Adapter
Quick Start Guide
Quick Start Guide
Electrode Use & Skin Care
1. Attach the electrode to the device with the liner in place to
protect the hydrogel. Remove liner before applying electrode
to skin.
2. Only apply the electrode to clean, dry skin. Never apply the
electrode over irritated or damaged skin.
3. Air out your skin every 5 hours, or when you wake up if using
overnight, to minimize the risk of skin irritation. Your device will
pulse at that time as a reminder. Reposition the device on your leg
or switch to the other leg.
4. The electrode gel may show signs of wear with normal use.
Each electrode is designed to last two weeks. Your electrode does
not need to be replaced until stimulation during therapy feels
uncomfortable.
Additional electrode options available at store.quellrelief.com.
Warnings
Quell is contraindicated if you have a cardiac pacemaker,
implanted defibrillator or other implanted electronic device.
Do not use when showering or bathing, or while operating a vehicle.
Commit to Using Daily for at least 30 Days
The more you use Quell, the better the chance of pain relief.
1. Chronic Pain is different for everyone. Please be patient. It
may take several weeks of consistent use before you start
to feel relief.
2. Set a daily therapy goal to stay on track – we recommend
using Quell for a minimum of 3 therapy sessions per day
either during the day or while sleeping.
3. Calibrate your Quell properly during setup to experience
optimal relief. Once calibrated, therapy should feel strong,
but comfortable during use.
4. Track your pain level, activity and sleep through the app.
Many people report improvements in mood, activity, and
sleep when Quell is working for them.
5. Personalize your Quell to meet your needs. Visit the
Settings menu within the app to select from various
Therapy, Stimulation, and Sleep options.
Questions?
Call 1-800-204-6577.
ElectrodesQuell Rel ief App Quell BandQuell De vice
For full User Manual, video tutorials, and FAQs,
visit www.quellrelief.com/quell-user.
2.0 PN 22048 21 Rev A
* Only use electrodes manufactured by NeuroMetrix, Inc.

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Chapter 2: Getting Started & Device Basics
Charging the Battery
A fully charged battery can provide up to 25 hours oftherapy for most
users.
To charge the battery:
Plug the USB cable into the micro-USB port on the side of the device.
Plug the other end of the cable into the AC Adapter.
The AC Adapter should then be plugged into a standard electrical
outlet. We do not recommend using a computer USB port for charging
Quell. The white indicator lights on the device will show that the device is
charging.
1
2
Chapter 2
Getting Started & Device Basics
1
2
When the battery is fully charged, the white indicator light will remain solid. It will take approximately 3
hours to charge an empty battery. When the battery is fully charged, unplug the cable from the device.
If the orange light blinks while device is connected to the outlet, charging has failed. Call 800-204-
657 7.
When recharging your device, if the battery is too low to start a therapy session (<10%), you can charge
the device for approximately 20 minutes to provide enough battery life for one therapy session.
Do not use your device with the USB cable connected as this creates a safety harzard.
Checking the Battery
To check battery level, pick up and hold the device in your hand. The
indicator light will blink white if the battery has sufficient charge to run at
least one therapy session. If no indicator light flashes, the battery needs to
be recharged following the steps above.
Getting Started
1. Fully charge your Quell device before first use. Once plugged into an outlet, a blinking white light
indicates your device is charging. Once the light turns solid, your device is fully charged.
2. Download the free Quell Relief app to your smartphone or tablet from the App Store or Google Play.
3. Follow the step-by-step setup instructions in the app to pair your device and setup your Quell Health
Cloud account while your device is charging
4. Once your device is fully charged, follow the instructions to calibrate your device and begin therapy.
For additional details on each step, follow instructions below.
Indicator Light

Chapter 3: Device Basics
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Downloading the Quell Relief App
Using your smartphone, open the App Store or Google Play. Search "Quell Relief" and download the app
to your device. Ensure that your smartphone's Bluetooth is turned on and that your device is running
iOS 10 or later, or Android 6 or later. Launch the Quell Relief app and follow the step by step instruction
within the app to pair and setup a Quell Health Cloud account while charging your device. Once your
device is fully charged, you can finish setup and complete calibration.
By signing up for a Quell Health Cloud account, not only do you access unique features and back up your
data so it's never lost, you have an opportunity to be part of something bigger. When you participate,
your de-identified data helps fuel scientific research on chronic pain. For more details, review Chapter 8,
Using the Mobile App.
The instructions below expand upon the setup instructions provided within the Quell Relief app.
Inserting the Device
Place the Quell band with the blue accents face down so that
you are looking at the back of the band. Insert the device into
the opening on the back of the band with the indicator light
facing up. The indicator light should align with the viewing
window on the front of the band, and the snap connectors
should be visible through the opening on the back of the band.
Attaching the Electrode
You will need to attach a new electrode prior to first use of
the device and replace the electrode on average every 2 weeks
thereafter. You should reseal the package if it contains an
electrode. Improper storage of the electrode will reduce its
life.
Only use Quell electrodes manufactured by NeuroMetrix, Inc.
1. Align the snaps on the electrode to the snap connections
on the back of the device. Insert snaps until they are
securely fastened to the device.
2. Remove the liner covering the electrode prior to placing the
device on your leg. Remember to save the liner as it should
be re-applied to protect the electrode when it is not in use.
When re-applying the liner to the electrode for storage,
ensure graphics on the liner are facing up so that the paper
side doesn't stick to the gel.
3. The electrode should be replaced approximately 2 weeks
from the date of its first use. You can set a tracking
reminder within the app.
Chapter 2: Getting Started & Device Basics

Chapter 3: Device Basics
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2”
Chapter 3: Device Basics
Device Placement
Place your Quell band on your upper calf about 1-2 inches below
the knee. You may place on either leg. Be sure the electrode is only
covering healthy skin that is not irritated and does not have cuts or
other wounds. Position the device so that it is comfortable. You may
position the device on the inside, outside, or back of the leg. You
should avoid placing the device directly over your shinbone.
If the device cannot be placed in the standard location as shown,
refer to APPENDIX D for alternate site options.
Wrap the band around your leg and adhere the Velcro® end. The band
should fit securely and comfortably around your leg. The electrode
should make smooth contact with the skin. If there is buckling of
the electrode, smooth the electrode and re-secure the band. It is
important that all four electrode pads are in contact with the skin. If
the pads are only partially on the skin, then the stimulation may feel
uncomfortable or your device may not start therapy.
The band was designed to stretch and fit most legs. If the band does
not fit your leg, contact Customer Care at 1-800-204-6577 or visit
www.QuellRelief.com for information on how to get an Extra Small or
Extra Large Quell band.
Back of Calf Inside of Calf
Recommended Positioning On Leg Avoid Positioning
Front of ShinOutside of Calf
Chapter 2: Getting Started & Device Basics

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Chapter 3: Calibration
The calibration process must be completed before first using the device. Watch the Calibration video on
the app or on quellrelief.com/quell-user before you calibrate for the first time.
Calibration allows Quell to learn your sensation threshold. Based on your sensation threshold,
Quell will deliver a customized stimulation level for pain relief
therapy. During the calibration process, Quell will slowly increase
stimulation several times to determine your sensation threshold.
Once you have completed the calibration process, you are ready to
begin your first therapy session.
Follow the instructions in the app to calibrate your Quell for first
use. If needed, you can recalibrate your device at any time within
the app.
Please Note:
• We recommend you sit in a quiet place where you can focus, with your feet flat on the floor during
the calibration process.
• To calibrate Quell, open the Quell Relief app, click the menu icon, select Settings and then Calibration.
Read the instructions on the How to Calibrate screen, and then click Start Calibration to begin the
calibration process.
• Wait until you feel the slightest tingle under the electrode, then immediately tap the button within
the app. It may take 20-30 seconds to feel the sensation the first time and the sensation may feel
very light.
• Do not wait until the sensation feels strong before tapping the button.
• You will feel subsequent stimulation slightly faster.
• If you need to stop at any point or feel that you have made a mistake, tap the "Stop Calibration"
button within the app. You can always recalibrate your device at any time.
• Once completed, calibration should set your therapy intensity to the optimal level for you. Therapeutic
stimulation will feel stronger than the sensation you felt during calibration. Therapy should always
feel strong, but comfortable.
Chapter 3
Calibration

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Chapter 4: Pain Relief Therapy
Chronic pain is different for everyone. Please be
patient. It may take several weeks of consistently
using Quell before you start to experience pain
relief. The more you use Quell, the better the
chance of pain relief. For best results, use Quell
daily. We recommend using Quell for a minimum
of 3 therapy sessions every day, but Quell can be
used up to 24 hours per day.
During a therapy session, the device will
comfortably stimulate the nerves in your leg to
provide pain relief. Regular therapy sessions last
60 minutes, and a new session will automatically
restart every other hour. If you prefer to not have
automatic restart turned on, you can change your
Therapy Dose under Settings within the app.
To optimize pain relief, you should feel a strong
but comfortable sensation during therapy. The
intensity that you will require is estimated based
on your sensation threshold determined during
calibration. However, because of differences
among people, this estimated intensity may
be too low and feel weak, or too high and feel
uncomfortable. In either case, you should adjust
the intensity within the app. The greatest pain
relief will be obtained when you set the intensity
to the highest level that is also comfortable.
The device will remember changes made to the
intensity during the first 10 minutes of therapy if
the therapy session is successfully completed, and
you should not need to adjust often. Please follow
the steps below for initiating a therapy session.
Preparing for Therapy Session
Before starting a therapy session make sure you
have an electrode attached to the device. You
should also check the battery to ensure it has
an adequate charge. If the indicator light blinks
Chapter 4
Pain Relief Therapy
white, you have sufficient charge to run a therapy
session. Place the device on your leg as described
in Chapter 2, Getting Started & Device Basics.
Starting a Therapy Session
To start a therapy session, tap the Start Therapy
button on the Dashboard screen in the app. The
indicator light will blink white for the duration of
the therapy session.
Automatic Start
You can also set therapy to start automatically
after attaching the device to your leg. Within
the Settings menu of the app, select Therapy
Automation and turn on Automatic Start. Once
enabled, therapy will begin automatically within
one minute of placing the device on your leg. You
will no longer need to start therapy within the app.
You can always stop therapy by tapping the STOP
button within the app, or by double tapping the
device firmly with your fingers.
What Therapy Feels Like
The intensity will gradually increase during the
first 2 minutes to an intensity that is strong
but comfortable.This strong but comfortable
intensity is based on results of the calibration
process. You may feel a strong sensation at first
but it will typically fade to a comfortable level
after a couple of minutes. If the sensation is
uncomfortable or painful, you should decrease
the intensity within the app. Therapy will continue
for 60 minutes in Regular dose (see Chapter 8 for
personalization options).
Once you have placed the device on your leg,

Chapter 5: Pain Relief Therapy
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the electrode and remember to reapply the
liner (see page 11 for instructions on
removing electrode).
If you leave the device on your leg for long periods
of time, you should check your skin regularly to
make sure that it does not get irritated. We
recommend airing out your skin for 15-30 minutes
after 5 hours or after wearing your device
overnight. You may also switch legs to give your
skin a break. Chapter 7 provides information on
skin care.
If a problem arises during a therapy session,
stimulation will stop and the indicator light will
blink orange for 2 minutes. Refer to APPENDIX B
for troubleshooting assistance.
You should air out your skin after wearing for 5
hours or when you wake up from wearing Quell
overnight. After 5 hours of wear during the
daytime, the device will pulse on and off for 1
minute as a reminder.
Personalizing Therapy
Therapy can be personalized to meet your needs
within the app. Within the Settings menu, you
can choose from a variety of Therapy Dose,
Stimulation, and Therapy Automation options. If
you decide to update any of these settings, the
new selection will take effect at the start of your
next therapy session.
To learn about the different therapy
personalization settings, please review Chapter 8,
Using the Mobile App.
you may cover the device with your clothing. You
should be careful not to dislodge the device and
electrode when covering with clothing. You may
go about your normal activities during a therapy
session. Do not shower, bathe or swim with the
device on your leg.
Adjusting Intensity During a
Therapy Session
Frequent adjustments should not be necessary;
however, if the sensation feels uncomfortable or
is not strong enough, you may make adjustments.
To adjust therapy intensity or to stop therapy, tap
the "+/-" buttons on the Dashboard screen in the
smartphone app.
You may adjust intensity as needed at any time
during a therapy session using the smartphone
app. Optimal pain relief will be obtained at the
highest intensity that is also comfortable.
If you find you are frequently adjusting intensity,
try recalibrating your device.
Ending a Therapy Session
Regular therapy sessions will run automatically
60 minutes on, then 60 minutes off, unless you
turn off therapy during a session or recalibrate
between therapy sessions.
To stop an active therapy session before it ends,
tap the STOP button on the Dashboard screen
in the app. If the app is not readily accessible,
you can manually stop therapy during a session
by double tapping the device firmly with your
fingers. Your leg should be still. You should not
remove the device while it is stimulating, so
make sure that the white indicator light is not
blinking before removing the device and electrode
from your leg. Otherwise you may experience
an uncomfortable sensation while removing the
device.
After ending a therapy session, you may either
leave the device on your leg or remove it. If you
remove the device, be careful to not damage
Double tap the
device firmly with
your fingers to stop
therapy manually.
Chapter 4: Pain Relief Therapy

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Chapter 5: Overnight Therapy
You may use Quell at bedtime and throughout the night to relieve pain while you sleep.
Before going to sleep, make sure the device is placed securely and comfortably around your
leg. All 4 gel pads on the electrode must be making complete contact with the skin. Start
a therapy session within the app. The default sleep setting is "Gentle Overnight." In this
setting, the first therapy session will stimulate at your regular intensity level. Subsequent
therapy sessions will start automatically every other hour throughout the night at a reduced
intensity. If you are asleep during these sessions, the device will automatically lower the
intensity.
Within the Settings menu of the app, you will find multiple sleep mode options that you can
choose from. If you decide to change Sleep Modes, the new selection will take effect at the
start of your next nighttime therapy session.
To learn about the different sleep settings, please review Chapter 8, Using the Mobile App.
Chapter 5
Overnight Therapy

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Chapter 6: Electrodes
Quell electrodes may look unassuming, but they
are key to enabling the Quell device to deliver
clinical strength therapy for drug-free pain
relief. The electrodes are designed to operate
consistently for up to 2 weeks. With repeated use,
the electrode gel may peel and/or dry out thereby
losing some of its adhesion, but the electrode is
still usable.
Electrode Removal
You should be careful to not damage the electrode
when you remove it from your upper calf area.
Slowly peel the electrode from your skin, while
making sure that each of the gel pads does not
separate from the electrode. Avoid touching
the gel with your fingers as
that can damage the gel
and decrease the life of the
electrode. After removal of the
electrode, you should cover it
with the liner.
If you have difficulty removing
the electrode, refer to Chapter
7 for tips on skin care to ease electrode removal.
Electrode Storage
Electrodes should always be stored with the
liner covering the gel pads. Place the liner with
graphic side up so the paper does not stick to the
gel. You may snap the electrode into the device
for convenient storage. For long term storage,
electrodes should be stored in the electrode pouch
or a sealed bag at room temperature out of direct
sunlight.
Electrode Replacement
The gel pads on the electrodes are primarily water,
so you may observe signs of wear during the
course of normal use, which can include irregular
edges on the gel pads, gel spreading, color fading,
or some of the underlying silver traces becoming
exposed. Your Quell electrode does not need to
be replaced until stimulation during therapy feels
uncomfortable and/or you see the orange error
light on the Quell device blink when you attempt
to start therapy.
The electrode should be replaced prior to 2
weeks if stimulation becomes painful despite
positioning the device so that the entire electrode
is making smooth contact with the skin. You
can order electrodes at www.quellrelief.com/
replace or from the location where you purchased
your device. It is recommended that electrode is
replaced at 2 week interval to maximize therapy
comfort and efficacy.
Electrode Options
Quell Standard Electrodes are included in most
Quell Starter Kits. They are designed to deliver
comfortable, effective pain relief year round. The
Standard electrode gel is optimized to provide
consistent, comfortable nerve stimulation in
most conditions and is ideal for daily use. Each
individual Quell Electrode is designed to last for
approximately 2 weeks of typical use.
Quell Sport Electrodes are a second type of
electrode designed to work with your Quell. The
Sport Electrode has a unique gel developed to
better hold up in situations with high levels of
humidity and perspiration. The Sport Electrode
has a gel that absorbs less moisture, but is
otherwise comparable to the Standard Electrode
included in the Starter Kit.
You can order replacement Electrodes at www.
quellrelief.com/replace.
Chapter 6
Electrodes

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Chapter 7: Skin Care
Quell works by electrically stimulating the sensory nerves in the upper calf through your skin. Some
people have dry or sensitive skin, and it is important to regularly monitor your skin where it contacts
the electrode to ensure that skin irritation does not occur. If your skin becomes irritated, using the
device may be uncomfortable. There are some simple things you can do to take care of your skin while
using Quell.
Ensure your skin is clean and dry. Never use the device on open wounds or rashes or over swollen,
red, infected, irritated, or inflamed skin.
Prevent Skin Irritation
Air out Skin
You should air out your skin for 15-30 minutes after 5 consecutive hours of wear during the day, or
after overnight use. You may also switch the device to the other leg every 5 hours, or when you wake
up. After 5 hours of use during the day, the device will pulse on and off for 1 minute as a reminder to
air out your skin.
If you have sensitive skin, you may also want to start slowly. Limit the time the device is on your skin
during the first week. If you do not experience irritation you may increase use while closely monitoring
your skin.
Check for Skin Irritation
Signs of skin irritation can include the following:
• Skin itches while device is on the skin or after removal
• Skin is red where it contacted electrode
• Raised or reddened hair follicles
If skin irritation develops you should not place the device over the irritated area until it completely
heals. You may apply a topical steroid cream to help accelerate healing and reduce irritation. You may
also place the device on the other leg or use different locations as shown in APPENDIX D.
If you experience skin irritation, then you should limit device use for a week to make sure that further
irritation does not occur.
Chapter 7
Skin Care

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From your mobile device or tablet, search for “Quell Relief” by NeuroMetrix, Inc. and download the app.
Before proceeding, make sure that Bluetooth® is enabled on your mobile device or tablet.
iOS and Android devices must have Bluetooth Low Energy (LE, also called Bluetooth Smart)
compatibility. The Quell Relief app also requires iOS 10 or later, or Android 6 or later.
For more insights on the data tracked with the app, visit www.quellrelief.com/how-quell-works/app/
and select Sleep, Therapy, Activity, or Pain.
Creating a Health Cloud Account
By signing up for a Quell Health Cloud account, not only do you access unique features and back up your
data so it’s never lost, you have an opportunity to be part of something bigger. Thanks to people like
you, the Quell Health Cloud is already one of the largest pain databases in the world, with over 15 million
hours of data. This data is fueling scientific research and Quell product improvements.
Only de-identified data are used in scientific research and product improvement. This means your
registration information (i.e., name, email or contact address) is disconnected from your personal usage,
sleep, activity and pain data so you cannot be identified. Our research is performed using aggregated
data. This means researchers combine your de-identified data with millions of other data points and
look at the data set as a whole.
Settings/Personalization Features
The tables below and on the next page describe app personalization features and settings, and how
they may help you optimize your Quell therapy during the day and at night.
Chapter 8: Using the Mobile App
Chapter 8
Using the Mobile App
Feature Why is it important?
Stimulation Select the type of stimulation Quell will provide during therapy based on what is
most comfortable for you. Standard is the default stimulation and will feel like a
constant vibration. Intense provides a more intensive stimulation option for those
that desire it. Sensitive should only be used if you find Standard and Intense are
uncomfortable. Your selection will take effect with the next therapy session.
Standard Feels like a constant vibration. (Default Setting)
Sensitive Feels like a low vibration.
Intense Feels like a strong vibration.
Therapy Dose You can select the duration and timing of your therapy sessions.
Manual Therapy is 60 minutes and does not restart automatically.
Low Dose Therapy is 30 minutes and restarts every 60 minutes.
Regular Dose Therapy is 60 minutes and restarts every 60 minutes. (Default Setting)
High Dose Therapy is 60 minutes and restarts every 30 minutes.

Chapter 9: Using the Mobile App
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Therapy Automation
Time of Day Adjustment Enable if stimulation feels particularly strong at a certain time of day. Once
enabled, indicate the time of day when stimulation feels strongest. The device will
automatically compensate so the stimulation feels consistent to you at the time you
selected.
Body Postion Adjustment Enable if stimulation is too strong when you lie down. Therapy intensity will
automatically compensate so stimulation feels consistent when you are lying down.
Automatic Start Enables device to begin therapy automatically within one minute of placing the
device on your leg. When enabled, you do not need the app to start therapy.
Weather When enabled, you will receive an alert when weather conditions may worsen your
pain if your profile indicates weather sensitivity.
Electrode Keep track of how many days have passed since you replaced your electrodes.
Calibration Used to determine the optimal therapy stimulation level the first time you use Quell.
Intensity Display When enabled, the stimulation intensity will be displayed on the Dashboard during
therapy sessions.
Sleep Position Tracking Enables device to track sleep metrics including time slept on back or on sides, and
the number of times position changed while sleeping. Sleep Position Tracking must
be initiated everytime you go to bed in order to track sleep position.
Lights Out Use if Quell overestimates your 'Time Asleep.' To indicate when you are ready for
sleep, press 'Lights Out.' To indicate when you are awake in the morning despite
remaining in bed, press 'Awake.'
Sleep Onset Detection The default setting detects when you actually went to sleep. Disable 'Sleep Onset
Detection' if Quell underestimates your time asleep. You should then indicate when
going to sleep using 'Lights Out.' This feature can be found under "Lights Out"
section of the Settings menu on the app.
Sleep Mode This setting may only be used when Therapy Dose is set to Low, Regular, or High.
Bedtime only Therapy is only delivered while falling asleep.
Gentle overnight Overnight therapy is delivered at reduced intensity. (Default setting)
Full power Overnight therapy is delivered at daytime intensity.
As needed Therapy is only delivered when Quell detects poor sleep quality.
Account Create a Health Cloud account to backup your data and contribute de-identified
data to fuel scientific research on chronic pain. If you already created an account, it
shows the email you used to create the account. You may change email associated
with your Health Cloud account or the password for the account.
Notifications
Push Notifications When enabled, you will get notifications with customized insights to exhance your
Quell experience and to keep you updated on new features and special deals.
Electrode Replacement When enabled, you will get a notification that it is time to replace your electrodes.
Rate Pain When enabled, you will get a notification to remind you to rate your pain every few
days. Tracking your pain helps uncover patterns and triggers.
Pairing Shows the serial number of the device to which it is paired. To pair with a different
device, tap Un-Pair.
Chapter 8: Using the Mobile App

Chapter 9: Using the Mobile App
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Tracking
Chronic pain can decrease your quality of life and impact your sleep and activity levels. Your Quell
device and app can track therapy usage, sleep, activity (steps and gait), and pain ratings over time. This
data can be viewed by day, week, month, or in 3 month periods. Reviewing this data over time can help
improve your pain management by identifying patterns and triggers, and by improving communication
with your doctor and other health care professionals.
Therapy Tracking - Quell will track the number of therapy sessions completed per day. For best results,
use Quell daily. We recommend wearing Quell for a minimum of 3 therapy sessions per day. The more
you use Quell, the better the chance of experiencing pain relief.
Sleep Tracking - Chronic pain is a common cause of poor sleep, and insufficient sleep may worsen
chronic pain. It is essential that you get as much high quality sleep as possible. Quell can help by
decreasing your pain overnight and monitoring your sleep. Note: Quell only tracks sleep when using the
device overnight.
Activity Tracking - An increased level of activity is one of the best ways to reduce your pain, lessen its
impact on your sleep and mood, and improve your health. Quell can help by measuring how much you
walk each day and how many steps you take. Your Quell also measures two quantitative features of
your gait (the manner in which you walk), its cadence and variability, which may be helpful in managing
your health. Note: Quell only tracks activity when you are wearing the device.
Pain Rating - You can review your pain rating and its impact on your sleep, activity, and mood over time
to track your progress with Quell.
About Me
A profile can help Quell personalize your therapy and enhance important chronic pain research. Your
profile can include information including year of birth, gender, height, weight, health conditions, pain
locations, pain duration, pain pattern, pain frequency, feelings about pain, and weather sensitivity.
Weather sensitivity must be completed in order to receive Weather Alerts. All identifying information is
removed before your data is used in research.
Rate Pain
Inputting your pain rating is useful to track your pain over time. By selecting Pain Rating, the app will
take you through a series of screens which will ask you to rate your pain over the last 24 hours, how
much pain interfered with your sleep, how much pain interfered with your activity level, and how much
pain interfered with your mood. These pain ratings are then tracked within the Tracking menu.
Videos
View the Videos section of the app menu for useful videos about Calibration, Getting Started and more.
Support
The Support section of the app menu features a comprehensive User Manual and Electrode Care Tips.
Store
Selecting Store within the app menu will take you out of the app to the QuellRelief.com store. Within
the store you can purchase additional electrodes, replacement bands, travel cases and more.
Chapter 8: Using the Mobile App

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16
Chapter 10: Maintenance, Safety, and Service
Maintenance
Contact Quell Customer Care at 1-800-204-6577
if the device requires service.
Cleaning Device
Use a damp cloth to clean the exterior of the
device. Do not use any other cleaning solutions
since they may damage the case. Never immerse
the device in water or other liquids.
Cleaning Band
Remove device before washing the band. Handwash
band with a gentle detergent and let it air dry. If
band material is becoming stretched, it may be put
through a gentle dryer cycle; ensure Velcro is adhered
to band before drying. Replacement bands are
available at www.store.quellrelief.com.
Device Storage
When device is not in use, store it in a dry location
away from direct sunlight.
Disposal
Used electrodes can be disposed of in normal
trash receptacles. Dispose of the device according
to national, state, and local regulations as the
device contains a Lithium-Ion battery.
Limited Warranty
NeuroMetrix, Inc. manufactures its hardware
products in accordance with industry standard
practices. NeuroMetrix warrants the Quell
device to be free from defects in materials and
workmanship at the time of shipment. The
warranty term is two years beginning on the
date of sale to the original purchaser, as further
described in the following text.
This warranty does not cover damage due
to external causes, including accident, abuse,
misuse, problems with electrical power, usage
not in accordance with product instructions,
failure to perform required maintenance, and
problems caused by use of parts or components
not supplied by NeuroMetrix. This warranty does
not apply to any product repaired or altered by
anyone other than NeuroMetrix or an authorized
NeuroMetrix representative. Quell products
purchased from unauthorized resellers are not
covered by this warranty.
NeuroMetrix will repair or replace products that
are shown to be other than as warranted above
and covered under this limited warranty that are
returned to NeuroMetrix under a NeuroMetrix
issued Return Material Authorization (RMA)
Number. To initiate a return, contact Customer
Care at 1-800-204-6577.
All parts removed from repaired products
will become the property of NeuroMetrix. If
NeuroMetrix repairs or replaces a product, the
original warranty is not extended.
NEUROMETRIX MAKES NO EXPRESS OR IMPLIED WARRANTIES
OR REPRESENTATIONS BEYOND THOSE STATED IN THIS
WARRANTY STATEMENT. NEUROMETRIX DISCLAIMS ALL OTHER
WARRANTIES AND REPRESENTATIONS, EXPRESS OR IMPLIED,
INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
NEUROMETRIX’S OBLIGATIONS FOR ANY FAILURE OF A
PRODUCT TO BE AS WARRANTED ARE LIMITED TO, AT
NEUROMETRIX OPTION, REPAIR OR REPLACEMENT OF THE
PRODUCTS SET FORTH IN THIS WARRANTY STATEMENT.
UNDER NO CIRCUMSTANCES WILL NEUROMETRIX BE LIABLE
FOR ACTUAL OR CLAIMED DEFECTS IN ANY PRODUCT BEYOND
THE REMEDIES SET FORTH IN THIS WARRANTY STATEMENT.
IN NO EVENT SHALL NEUROMETRIX BE LIABLE FOR SPECIAL,
INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF
OR IN CONNECTION WITH THIS AGREEMENT REGARDLESS OF
THE LEGAL THEORY UPON WHICH SUCH CLAIM IS BASED AND
EVEN IF SUCH PARTY HAS BEEN ADVISED OF THE POSSIBILITY
THEREOF.
Chapter 9
Maintenance, Safety, and Service
Chapter 9: Maintenance, Safety, and Service

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17
APPENDIX A: Indicator Light
Device on Skin
Device State Indicator Light Status Explanation
Standby No Light Illuminated Device in standby, no therapy or
calibration in progress
Calibration Double Blinking White Light Calibration in progress
Therapy Double Blinking White Light Therapy session in progress
Stimulation halted
earlier than expected
Orange Light Blinking Once Per Second Therapy or Calibration has halted due
to an error condition; see Appendix B for
possible causes.
Device off Skin
Device State Indicator Light Status Explanation
Battery Check
(after picking up device)
Single Blinking White Light Once Every
3 Seconds
Battery has adequate charge to run
therapy
No Light Illuminated Battery needs to be charged.
Charging
Device State Indicator Light Status Explanation
Charging Blinking White Light Device is charging
Solid White Light Device is fully charged
Orange Light Blinking Charging issue, call Quell Customer Care
at 1-800-204-6577.
APPENDIX A
Indicator Light

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18
APPENDIX B: Troubleshooting
Calibration
I cannot start the calibration procedure.
Within the app, the Calibration option can
be found under the Settings menu. To start
calibration, tap "Start Calibration."
You should be sitting down or standing still with
your foot flat on the floor. Make sure the electrode
is snapped onto the device, the liner has been
removed, and your Quell is properly placed on
your leg (on the upper calf, 1-2” below your knee).
All 4 gel pads on the electrode must be making
complete contact with the skin.
I am trying to calibrate but I don’t feel anything.
Confirm electrode liner has been removed and
that the light is blinking. The purpose of the
calibration process is to measure your sensation
threshold, meaning that when you feel even the
slightest sensation, you should tap the button
within the app. Do not wait until the sensation
feels very strong to tap the button. It may take
20-30 seconds to feel the sensation the first time
and the sensation may feel very light. You will feel
subsequent stimulation slightly faster. If you go
through the calibration process and never feel
stimulation, the therapeutic intensity will be set at
the maximum possible intensity.
APPENDIX B
Troubleshooting
Calibration Tips
• It is a good idea to wait about 5 minutes
after putting the electrode on for the skin-gel
interface to stabilize, before you start
calibrating.
• If your leg is cold (for example, if you come in
from the outside during winter), you should
wait 30-60 minutes so that your leg warms
up to room temperature before calibrating.
This is because cold will artificially elevate the
sensation threshold (the same reason cold
makes you feel numb).
• Do not calibrate right after a therapy
session because the sensation threshold will
be artificially elevated. You should wait at
least 1 hour and preferably 2 hours after a
therapy session.

APPENDIX B: Troubleshooting
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19
Therapy
Make sure you initiate therapy only after the device
and electrode are properly placed on the calf.
I am not getting pain relief.
We recommend that you use your Quell daily for
at least 3 therapy sessions per day for the first
month. Make sure you feel a strong but comfortable
sensation during therapy sessions (indicated
by single white blinking light). If not, you can try
calibrating the device again or increasing the
therapeutic intensity by using the app or pressing
and holding the button.
The therapy stopped and the light is blinking
orange continuously.
A blinking orange light typically indicates poor
contact between the electrode and the skin. This
may occur because the device is not securely
placed on the leg or because the electrode is
dry. Check that the electrode is snapped in, the
electrode gel pads are in complete contact with
the skin, and the band is attached snugly (but not
too tightly) on the leg. Start therapy again. If the
problem recurs, remove the device and inspect
the electrode. Place the device back on the leg
and restart the therapy session. If the problem
persists, then replace the electrode.
The light is blinking white but I do not feel
anything.
The intensity may be too low. Use the app to
increase the intensity until you feel a strong but
comfortable sensation. Alternatively, calibrate the
device again.
The device isn’t automatically restarting.
Go to Settings and Therapy Dose. If "Manual" is
selected, you need to manually restart therapy.
With any other selection (Regular, Low, or High
Dose), therapy will automatically restart as long
as the device is attached to your leg and all 4
gel pads on the electrode are making complete
contact with your skin.
Therapy may also need to be manually restarted
if your last therapy was manually stopped/halted,
your last therapy was halted because of a trip
condition, you calibrated your device since your last
therapy, or you charged your device since your last
therapy session.
The therapy stings or feels uncomfortable.
Turn off the device by using the app or by firmly
double tapping the device with your fingers.
Remove the device and inspect the electrode,
make sure all four electrode gel pads are in good
condition. If your skin is dry then consider using
skin moisturizer, but wait 20-30 minutes for
the moisturizer to absorb into your skin before
attaching your Quell to your leg. Place the device
and electrode back on your leg, making sure that
there is complete contact between the electrode
and the skin. Sometimes it is helpful to smooth the
electrode onto the skin first and then secure the
sports band. If the discomfort persists, then you
should replace the electrode.
If replacing the electrode doesn’t help, you may
need to recalibrate. One way to check calibration
level is to see how long it takes to feel any
sensation during therapy session. If it is felt within
the first five seconds, it is a good indication that
calibration is too high.
I have leg cramps/muscle contraction during
therapy, or muscle soreness after use.
Confirm that the intensity is appropriate – strong
but comfortable. You can recalibrate. You may
also want to decrease the intensity, as long as it
remains strong.
Try the other leg. One leg may be more prone to
cramping or soreness than the other leg.
Reposition the device to minimize the amount of
electrode on the back of the calf. This usually means
positioning the device on the inside or outside
rotated towards the front (but not right on top of
the tibia bone).