ETEKCITY TENS Unit User manual

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Questions or Concerns? [email protected] • [phone]
TENS Unit
User Manual
Model: ETU-134

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Thank you for purchasing the
TENS Unit by Etekcity.
If you have any questions or concerns,
please reach out to our helpful Customer
Support Team at [email protected].
We hope you enjoy your new TENS unit!
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Find us at etekcity.com

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Table of Contents
Package Contents
Specications
Safety Information
Function Diagram
Digital Display
Controls
Getting to Know Your TENS Unit
• Controlling Pain
• Length and Intensity
• Using the TENS Unit
- Electrode Placement Guide
- Treatment
Maintenance
Troubleshooting
Glossary of Symbols
Warranty Information
Customer Support
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6
11
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14
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15
16
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19
21
24
27
37
39
1 x TENS Unit
2 x Electrode Pads (40 x 40 mm)
4 x Electrode Pads (50 x 50 mm)
2 x Electrode Pads (50 x 100 mm)
4 x Lead Wires
1 x Micro USB Cable
1 x User Manual
1 x Quick Start Guide
Package Contents

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Frequency 1–100Hz
Pulse Width 70–300µs
Output Voltage 0–60V±20% (at 1000Ωload)
Output Intensity level 0~20 levels
Electrode Connection Type Pigtail
Operation Time 10–60 minutes
Dimensions 5.5 x 2.5 x 0.6 in /
138.8 x 63.3 x 15.5 mm
Weight 3.2 oz / 96 g
Operating Environment
Temperature: 41°F–104°F / 5°C–40°C
Relative Humidity: 30–75%
Atmospheric Pressure: 700hPa–1060hPa
Transport and Storage Environment
Temperature: 14°F–131°F / -10°C–55°C
Relative Humidity: 10–90%
Air Pressure: 700hPa–1060hPa
Specifications

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Suggest Adapter Input: 100–240V~, 50/60 Hz, 0.2A
Output: DC 5V, 300mA
Battery Type 3.7V, 250mAh Li-ion battery
Rated Power 4.2V
Charging Time 3 hours
Automatic Shutoff 3 minutes
Service Life TENS Unit: 3 years
Electrodes: 10–15 uses
IP Code IP22
Classification of ME Equipment: Internally powered(operating) / Class II (charging)/
Continuous operation

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Safety Information
Contraindication
Warnings
•Do not use the TENS unit if you have or use
cardiac pacemakers, implanted debrillators,
respirators, electrocardiographs, or any
implanted metallic or electronic devices,
including any electronic life support. This
can cause electric shock, burns, electrical
interference, or even death.
•Always check the TENS unit and the electrode
pads for damage before using. Do not use the
TENS unit or electrodes if they are damaged in
any way.
Please read and follow all instructions and safety
guidelines in this manual.
• You should consult your physician if:
- You have never used a TENS unit
before. The TENS unit may cause lethal
disturbances to heart rhythm in certain
individuals.
- You have had or are using medical or
physical treatment for your pain.
- Your pain worsens or continues for more
than 5 days.
- You experience adverse reactions from the
TENS unit.
•Do not use the TENS unit on someone with a
cognitive impairment (e.g., dementia, Alzheimer’s
disease). People who have a cognitive
impairment may be unable to use the TENS unit
according to the instructions and may become
agitated by the treatment.
•Do not use the TENS unit on children, as it has
not been evaluated for pediatric use.

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• Keep the TENS unit out of reach of children. The
unit contains small pieces that may be swallowed,
and the cable may cause strangulation.
•Do not use the TENS unit on your eyes, mouth,
face, the side of your neck (the carotid sinus),
any area of the throat (front of the neck), or
your across your heart. This could cause severe
muscle spasms that may result in airway closure,
breathing difculties, or adverse effects on heart
rhythm or blood pressure.
•Do not use the TENS unit on your chest. The
TENS unit uses electrical currents. Using the
TENS unit on your chest may cause rhythm
disturbances to your heart, which could be lethal.
• Use the TENS unit only on normal, intact, clean,
and healthy skin.
•Do not use the TENS unit over open wounds
or rashes, or over swollen, red, infected, or
inamed areas or skin eruptions (e.g., phlebitis,
thrombophlebitis, varicose veins).
Warnings (cont.)
•Do not use the TENS unit over, or close to,
cancerous lesions.
•Do not place the electrodes inside body cavities,
such as the mouth. This may cause irritation,
burns, or electric shock. The TENS unit is not
designed for internal application.
•Do not use the TENS unit in the presence of
electronic monitoring equipment (e.g., cardiac
monitors, ECG alarms). This equipment may not
operate properly when the TENS unit is in use.
•Do not use the TENS unit in the bath or shower.
The TENS unit is not waterproof, and a humid
environment may damage it, resulting in
personal injury.
•Do not use the TENS unit while sleeping.
•Do not use the TENS unit while driving, operating
machinery, or during any activity in which
electrical stimulation can put you at risk of injury.
•Do not modify the TENS unit or the electrodes.
This could cause improper functioning.

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Warnings (cont.)
Precautions
• The condition of your electrode pads may affect
the safety and effectiveness of the treatment.
Take the following into account:
1. If the electrode pads are too small or
not correctly applied, this may result in
discomfort or skin burns.
2. If you do not know if the electrode pads
can be used with the TENS unit, contact
Customer Support (see page 39).
•Do not use in places with ammable or explosive
gases.
• The TENS unit is not effective for pain of central
origin, including headaches.
• The TENS unit is not a substitute for pain
medications and other pain management
therapies.
•The TENS unit has no curative benets.
• The TENS unit treatment may not be effective
for everyone. Consult your physician or
healthcare professional to nd out if TENS will
work for you.
• The long-term effects of electrical stimulation
are unknown.
• Because the effects of electrical stimulation on
the brain are unknown, do not use the TENS unit
on your head.
• Electrical stimulation and the pads’ conductive
gel may cause skin irritation or hypersensitivity.
The irritation can usually be reduced by
alternative pad placement.
• If you have a suspected or diagnosed heart
disease, follow precautions from your physician.
• If you have suspected or diagnosed epilepsy,
follow precautions from your physician.
•Do not use if you may have internal bleeding,
such as from an injury or a fracture.
• If you had surgery recently, consult your
physician before using the TENS unit. Using the
TENS unit may disrupt the healing process.

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• Use caution when you use the TENS unit over
areas of skin that lack sensation.
• The impact of using the TENS unit during
pregnancy is unknown and may be unsafe. Use
caution when you use the TENS unit over the
uterus during pregnancy or menstruation.
•Do not use plaster or tape to attach the
electrodes to the skin.
•Do not let the electrode pads touch metal
objects, such as belt buckles or jewelry.
• Use the TENS unit only with the electrodes and
accessories recommended by Etekcity.
•Always end the TENS unit treatment before you
unplug the TENS unit or the electrodes. If you do
not end the treatment, you may get a harmless
but unpleasant sensation in your ngers.
•Do not use on your spine or backbone.
•Do not place electrodes on both legs or feet at
the same time. Only treat 1 at a time.
Precautions (cont.) General Recommendations
•Do not use the TENS unit for any other purpose
than what it is intended for.
• The TENS unit is designed for use by a single
adult person. For hygienic reasons, electrodes
should not be shared.
•Do not use the TENS unit if you are connected
to high-frequency surgical equipment. This may
result in burns on the skin under the electrodes
and may damage the TENS unit.
•Do not use the TENS unit within 3.3 ft / 1 m from
shortwave or microwave medical equipment.
Close proximity to this equipment may cause
unstable TENS unit output.
• Although you can use the TENS unit indoors
and outdoors, it cannot withstand all weather
conditions.
• The electrode pads have a limited shelf life.
Please check the packaging for the use-by date
before use. Do not use expired electrode pads.
•Always use and store the electrodes according
to the instructions.

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General Risk
Specic RisksGeneral Recommendations (cont.)
• The TENS unit should be kept at least
3.3 ft / 1 m from electric equipment such as TVs,
radios, electromagnetic furnaces, to avoid likely
electromagnetic interference.
•Do not use while charging. Unplug the power
cord before using.
• Not for commercial use. Household use only.
• The TENS unit only treats symptoms. It reduces
the feeling of pain, but it does not cure the cause
of the pain. Pain may be a signal from your body
that some part of your body is damaged and
needs attention.
• You may get skin irritation and burns on the skin
under the electrodes.
• You may get a headache or other pain if you use
the TENS unit near your eye, or on your head or
face.
• You may experience muscle exhaustion or
muscle soreness after extended use on the same
muscles (more than 30 minutes a session, up to 3
times a day).
SAVE THESE
INSTRUCTIONS

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A
F
C
D
IJKLM
E N
O
H
G
B
A. Display
B. A Channel Intensity
Increase/Decrease
C. Therapy Modes [15]
D. Time Button
E. Lead Wires
F. Battery Indicator
G. B Channel Intensity
Increase/Decrease
H. Power/Pause Button
I. A1 Output
J. A2 Output
K. Micro USB Port
L. B1 Output
M. B2 Output
N. Electrode Pad
O. Micro USB Cable
Function Diagram

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A
B
G I KH J L
C D
E
F
A. Time Display
B. A Channel Intensity Level
C. Body Part Icons
D. Program Number
E. Pause Icon
F. B Channel Intensity Level
G. Kneading Icon
H. ACU (Acupuncture) Icon
I. Tap Icon
J. Cupping Icon
K. Scraping Icon
L. Random Icon
Digital Display

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Controls
Press to turn on. Press again during
treatment to pause or continue. Press and
hold for 2 seconds to turn off.
Press to increase time in 10-minute
increments.
Note: When you rst turn on the TENS unit,
the default time will be 20 minutes.
Note:
•You can only use 1 therapy mode at a time.
• The TENS unit will automatically default to the
last mode selected.
Body Part: Press to select which area of the body to
focus on. The selection will ash on the display and
show the corresponding number.
Massage Type: Press to select the massage type.
The selection will ash on the display and show the
corresponding number.
1. Neck
2. Shoulder
3. Back
10. Knead
11. ACU
4. Elbow
5. Hip
6. Ankle
12. Tap
13. Cupping
7. Knee
8. Leg/Arm
9. Wrist
Therapy Modes
14. Scraping
15. Random

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Getting to Know Your TENS Unit
Transcutaneous Electrical Nerve Stimulation
(TENS) units are used for temporary relief of sore
and aching muscles in the body due to exercise or
strenuous activities such as normal household work
activities. The 4 channels deliver tiny electrical
impulses sent through the skin to the nerves to
help manage pain by signaling the body to produce
endorphins, the body’s natural pain killer.
The TENS Unit is designed to be used for temporary
relief of pain associated with sore and aching
muscles in the shoulder, waist, back, neck, upper
extremities (arm) and lower extremities (leg) due
to strain from exercise or normal household work
activities. It should be applied to normal, healthy, and
dry skin of adult patients.
The TENS unit works best on acute pain because it
is localized. Acute pain occurs in 1 area for less than
3 months. If you have chronic pain (often including
experiencing pain in more than 1 area and for
longer than 6 months), then the chronic pain may
be compounded by other issues that the TENS unit
cannot address.
The TENS unit cannot cure pain or the original cause
of the pain. It can only provide temporary relief or
reduction of pain.
Use the TENS unit as soon as your pain begins. Start
with 1 session. If you address your pain early, it may
prevent the pain from becoming worse.
Controlling Pain

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The TENS unit should be used once a day, for up to
30 minutes for each treatment area. Depending on
the level of pain, you may use the TENS unit up to 3
times a day for a maximum of 90 minutes total. Do
not use more than 3 times a day or 90 minutes total
per treatment area.
When turning off the TENS unit, always turn
it off with pads still adhered to skin. Rate your
pain between 1 (low) and 20 (high) to check your
progress.
Intensity is based upon your level of comfort. When
learning how to use the TENS unit, begin with a low
intensity and use the TENS unit for a short period
of time. Use caution when working with higher
intensities at the limit of what you can tolerate. Do
not exceed your comfort level.
Length and Intensity Stop using the TENS unit if:
• Pain has reduced or stopped.
• You experience an adverse reaction such as
skin irritation, redness, burns, headaches, other
painful sensations, or any increased discomfort.
• Your pain becomes chronic and severe, or
continues for more than 5 days.
Note:
• If pain does not improve and you become
sore from overuse, stop using and do not
treat those areas for 2 days. If this happens
again, reduce the treatment time and
intensity settings for future treatments.
• If you feel pain, dizziness, discomfort, or
nausea while using the TENS unit, call your
physician or medical practitioner.

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1. Prep the area by cleaning your skin. Wash and
pat dry.
2. Gently peel the pads from the plastic and place at
least 2 in / 5 cm apart on clean, dry, and healthy
skin near or surrounding the area of pain.
Using the TENS Unit
Note:
• Before placing electrodes on skin, make
sure the TENS unit is completely turned
OFF or the intensities are set to 0.
•Do not allow the pads to touch each other.
•Never remove the self-adhesive pads from
the skin while the TENS unit is turned on.
Note: Before rst use, fully charge the TENS unit
(see Charging the Battery, page 21).
Electrode Placement Guide
Hip: Pain in the hip area is often
the result of wearing of the
joints (arthrosis). Pain in the hip
region may be treated with the
application of electrodes above
and below the joint. In addition,
pain may also radiate outwards,
e.g. towards the groin. In this
case, an electrode is applied
to the main pain point on the
hip while a second electrode is
applied in the direction that the
pain is radiating.

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Shoulder: Attach 1 set of
electrodes in front and 1 set on
the back of the muscle where you
feel pain. Also attach both pads
on the shoulder according to your
pain.
Upper Arm: Attach both
electrodes on either side where
you feel pain.
Elbow: Attach both sets of
electrodes on either side of the
joint where you feel pain.
Neck: Attach both sets of pads to
the back of the neck. Do not place
on carotid artery or throat.
Lower Back/Lumbar: Attach
both sets of electrodes to the
lower back with the backbone in
the center. Do not place on the
backbone or spine.
Upper Back: Attach both sets
of electrodes to the upper back
with the backbone in the center.
Do not place on the backbone or
spine.

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Wrist/Hand: Attach both sets of
electrodes to the hand where you
feel pain.
Knee/Joint: Attach both sets of
electrodes above or above and
below the joint with pain.
Calf: Attach both electrodes on
the calf or leg where you feel
pain.
Ankle/Foot:
• For pain on the outside of
the ankle or foot, attach
electrodes above and below
the pain point.
• For pain on the inside of
the ankle or foot, attach 1
electrode above the ankle
and 1 in the center of the
sole of your foot.
Note:
•Do not place electrodes on both legs or feet
at the same time. Only treat 1 at a time.
•Only place electrodes according to Electrode
Placement Guide.

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1. Connect the lead pins to the connectors on the
electrodes. Then, place the electrodes on your
skin (with the TENS unit turned OFF). Each wire
has 2 leads with pin-inserted connectors. Make
sure the metal on the pins is not exposed.
Treatment 2. Insert the lead wire plugs into the sockets on the
TENS unit. You can use up to 4.
3. Press to turn on the TENS unit. Wait 2
seconds for the TENS unit to fully turn on.
4. Select 1 of 15 therapy modes. The selected
icon will flash on the screen and show the
corresponding number.
Note: This TENS unit has 4 independent channels
(A1, A2, B1, B2). Make sure you know which
channel(s) you want to use before you connect
wires to the TENS unit. Figure 1.1

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7. Press to pause the treatment at any time.
Press again to resume.
8. Press and hold for 2 seconds to turn off the
TENS unit at any time.
9. Unplug the electrodes from the TENS unit. Then
peel the pads off the skin gently and replace on
the plastic lm. Never remove pads from skin
before turning off the TENS unit.
Note: If the TENS unit is inactive for 3 minutes, it
will turn off automatically.
5. Optionally, press to increase the time by
10-minute increments for up to 60 minutes . The
time will show on the screen. The default time is
20 minutes.
6. Press or to begin the treatment. Press
again to increase the intensity.
Note:
• Intensity can be adjusted independently for
A and B channels.
• Press / repeatedly on the left side and
right side to raise or lower intensity for
channel A (A1 and A2 output) and channel B
(B1 and B2 output).
• Lowering both intensities to 0 will reset the
timer.
Caution:
•Do not remove electrode pads by pulling on
the wire. Peel gently from any corner.
•Do not place electrodes on the carotid
artery, throat, backbone, or spine.
• If you feel pain, dizziness, discomfort, or
nausea while using the TENS unit, stop
using immediately and call your physician
or medical practitioner. Do not exceed your
comfort level.