Expain CHANGE X User manual

USER MANUAL
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CHANGE ARM

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2
Contents
1 Components
2 Introduction
3 Before use
4 How to mount the device
5 How to unmount the device
6 Usage
7 Usage with app
8 Biofeedback and habits
9 Battery and charging
10 Maintenance and storage
11 Technical specications
12 Safety information

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Components
1. Button
2. Light
3. USB connector
4. Adjustable arm strap
5. USB cable
1 2
3
4
5

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Introduction
Congratulations on your new
EXPAIN Change Arm! This
is a unique device that allows you
to monitor the muscle activity in the
forearm muscles in a
new way. EXPAIN Change Arm
provides Biofeedback to
help you change habits that may
cause pain. Biofeedback is a
learning process where observation
of the signals from your own body,
leads to a changed attitude. The
device vibrates when you have
strained muscle activity pattern.
This allows you to change your bad
habits, which again may eliminate
the cause of your pain.
EXPAIN Change Arm can be
connected with a smartphone via
Bluetooth Smart, or it can be used
without connection to phone. If you
wish to keep track of your historical
muscle activity pattern, you must

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download EXPAIN app (iOS or
Android). See separate section
or www.expain.com for more
information.
The unit is wireless, powered with a
rechargeable battery and is placed
on the painful muscle in the
forearm, and where the forearm is at
its thickest.
Before Use
EXPAIN Change Arm is made for
personal use. Read instructions
carefully. The unit must be
charged before the rst use. See
section for battery and charging
for more information on how the
device is charged. (NB: The device
should not be used at night,
and the unit should not be on the
body continuously for over 16 hours.
If there are signs of allergic reactions
or rash, immediately stop using the
device. Use the device with caution).

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How to mount the device
1. Loosen the lock function
on the armband and pull
it over the hand and up
onto the forearm.
2. Make sure the rubber
elds inside of the
belt are over the most
painful muscle and
across the muscle
bers. Attach the
product on the side
you have the most
pain, for most people
this is the dominant
side (right for right-
handers and left
for left-handers).
If you wish to measure
both arms
simultaneously we
suggest one

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extra device.
3. Tighten the belt so hard
that it is snug but does
not restrict movement
or blood ow in
the forearm.
Let the device be on your body
for the time period you want
biofeedback.

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How to unmount your device
1. Take the unit of the body
by loosening the
belt tensioning function
and take it of like
a bracelet.
2. Recharge the unit
to ensure that it is ready
for the next use.

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Usage
EXPAIN Change Arm is
turned on by pressing the button on
top of the unit.
When using the device, it will vibrate
when it recognizes strained
muscle activity patterns.
Read more in the section of
Biofeedback and habits.

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Usage with app
You can get more from the EXPAIN
Change Arm device if you
connect it to a smartphone.
The unit will then automatically
transfer data to your smartphone
when it is within reach and you can
follow the historical development in
your app. You can, for example do
ergonomic changes by looking at
your muscle activity.
1. EXPAIN Change Arm is
connectable whenever
the device is turned on.
It is not possible to connect
the device to multiple phones
simultaneously. If you want
to pair the device with another
phone, you must remove the
device in the settings in your app /
phone, and restore factory settings
if necessary, see the Battery and

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charging section.
The EXPAIN app can be
downloaded from Apple
App Store or Google Play Store.
Follow the instructions in the app.
The app has a built in pain diary
that allows you to compare your
muscle activity patterns with
your pain. In this way
you can see when you’ve had the
most strained muscle activity and if
this has a relationship with
your pain. It is recommended to
register your pain regularly, and
to use the device at least for a few
days to get the most out of EXPAIN
Change Arm.

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Light and vibration
The table below shows the meaning
of various lights and vibrations.
Function Light/Vibration
Connected
Bluetooth Smart
Blue ash
Low battery Red ash
On, without
Bluetooth
connection
Purple ash
Low battery Red ash
Fully charged Purple
Notice sustained
muscle activity
Short vibrations
Low battery Long vibrations

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Biofeedback and habits
Habit change happens when
the device is used often and you
take breaks or do some exercises
every time the device vibrates.
Research shows that biofeedback,
which is a learning process, helps
to improve health and overall
performance by observing the
signals generated by one’s own
body.
The device will vibrate when
it recognizes strained
muscle activity patterns
(Sustained muscle activity). When
the device vibrates, try to take a
short break from work, do some
arm exercises or lower your hands
so that the muscles in the forearm
region relax. A good relaxation
exercise is to breathe calmly in with
the nose and then releasing the
Function Light/Vibration
Connected
Bluetooth Smart
Blue ash
Low battery Red ash
On, without
Bluetooth
connection
Purple ash
Low battery Red ash
Fully charged Purple
Notice sustained
muscle activity
Short vibrations
Low battery Long vibrations

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breath out of your mouth while you
let your arms and shoulders hang
down by the side of the body.
Repeat this exercise 2-5 times.
Battery and charging
The device has a battery life of
approximately 8 hours of normal
use. The sensor ashes red to
indicate low battery. In addition, the
device vibrate Long vibrations when
the battery is critically low.
EXPAIN Change Arm is
charged with supplied or
corresponding micro USB cable.
Unmount the device from your arm
and charge it completely
before next use. The lights is red
during charging, and purple when it
is fully charged.
Restoring factory settings. If you
can’t connect your phone the device
can be reset to its original

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state. This is done as follows: Turn
the device on and set it to charge.
Press the button until the device
starts ashing red. When the device
lights red and vibrates, the factory
settings are restored.
Maintenance and Storage
Clean the device with a dry or
slightly damp cloth.
Make sure the device does not get
wet. It is not recommended to use
the device in humid environments
or if you plan to do activities that will
cause sweating.
The Arm-strap can be washed
in water, but only after that the
electronic unit has been removed.
The unit should be transported,
stored and operated in
temperatures between 10°C
and 40°C, at a relative humidity

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between 30% and 85% and with an
atmospheric pressure between 500
and 1060 hPa. If the device does not
work correctly, contact support at
www.expain.com

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Technology Surface Electromy-
ography (sEMG)
Power LiPo rechargeable
battery
Bluetooth Bluetooth 4.2
Smart
Size (DxBxH) 65 mm x 360 mm x
15 mm
Weight 45 g
Safety IEC 62133
EN 60950
EMC EN 301 489-17
EN 300 328
EN 301 489-1
Safety RoHS, REACH
Primary Skin
Irritation Test
Made in Norway
Tehnical specications

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Safety information
Applications
For Biofeedback against
strained (sustained) muscle activity
in the forearm muscles.
Safety precautions
Do not use this product if you
have very sensitive skin.
Warning!
Do not use the device on other
locations on the body than those
specied in this manual.

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Expain AS
Karl Johans gate 13,
0154 Oslo, Norway
www.expain.com
Support:
www.expain.com
[phone]