Specifications

Method 1
Method 2
1. Charging case with battery life status lights
2. USB charging port
3. Earbud status light
4. Touch strip
5. Voice mic
6. Acoustical vent hole
7. L/R indicator
8. Magnetic charging contacts
Included
Ear Cushions
Earbuds
Charging Cable
Charging Case
Instructions
Start
Power On
Mobile Phones and Headphones
Pairing
Bluetooth Off
Answer Call
Connection Lost
Incoming call
End Call
Pause/Play
Music
Reject Call:
Out of Connection Range
Open the charging case, the white lights will illuminate for 1 second.
The earbuds will automatically power on.
Earbuds Charging
Charging
Place the earbuds in the charging case.
Charging: The left and right lights of the charging case will flash
Fully charged: No charging case lights are illuminated
Charging Case Light Language
LED status when the charging case is charging
LED status when charging case is not charging
When the power is below 30%, the left light flashes.
When the power is 30%~60%, the left light is always on
and the center light flashes.
When the power is greater than 60%, the left and center
lights are always on and the right light flashes.
When the power is 100%, all 3 lights remain on.
Safety and Care
Hold for 2 seconds
<10%
10%~30%
30%~60%
70%~100%
When the power is below 10%, the left light flashes.
When the power is 10%~30%, the left light is on.
When the power is 30%~60%, the left and center lights are on.
When power is 70%~100%, all 3 lights remain on.
LED Status When the Charging Case Charges
the Earbuds
The L side charging case light slowly flashes when the L earbud is charging.
The R side charging case light slowly flashes when the R earbud is charging.
When L and R earbuds are charged at the same time, the L and R charging
case lights slowly flash at the same time.
When the earbud’s batteries are full, the charging case lights
will indicate the battery power level for 5 seconds.
<30%
30%~60%
>60%
100%
Using earbuds at high volumes for extended periods of time may result in
Model: 702334, 3.7V, 500mAh
GOLDEN CEL BATTERY CO. LTD.
Yinhu Industrial Park, Jiaoyitang Management Zone
Tngxia Town, Dongguan City, Guangzhou Province
to low at all times for your safety.
Do not use while driving a car, cycling, operating machinery, or performing other
activities that require hearing surrounding sounds.
Earbuds may not work properly under high temperature or high humidity conditions.
Do not use any corrosive cleaner/oil to clean the earbuds.
If the earbuds come in contact with liquids, quickly wipe away .If submerged in
water, do not turn the earbuds on until completely dried.
Tips: liquid submergion voids the warranty.
Keep the earbuds and packaging out of reach of children.
* Do not disassemble, strike, crush or put the battery into fire. Do not expose
the battery to conductive materials, liquids, fire, or high temperatures.
* Do not allow metal objects to touch the two poles of the battery. Do not
continue to use the battery if it has bulges, leaks, discoloration, odors, or any
other abnormality.
* Do not use the battery after it has been submerged in water.
* If the battery is used improperly, it may explode or leak, causing burns and
other personal injuries. If the battery leaks, it should be carefully disposed of
according to the local laws and regulations concerning
battery disposal.
FCC Warning
Battery warning!
Double-tap
Double-tap on the L/R
touch strip.
Long hold the L/R touch strip for 2 seconds.
Double-tap on the
L/R
touch strip.
Power Off
Place the earbuds into the charging case and closed the lid
to automatically power down earbuds.
Product Overview
5
4
3
7
8
6
Power on the left and right earbuds as described in the
“Power On” portion of this guide.
Find and select "KOSS TWS150i" in the Bluetooth list.
NOTE:
1. When power is on, the earbuds will auto-connect with the last
connected device within 10 seconds. If the connection fails,
the earbuds will enter pairing mode.
2. If the earbuds are not connected to any device, they will
automatically turn off after 10 minutes
Next Track
Hold the right earbud touch strip for 2s
Hold the left earbud touch strip for 2s
Note: This function is not supported
when L earbuds are used alone.
Previous Track
Double tap the L/R earbud touch strip to pause/play music in
standby or music mode.
While paused: Indicator lights illuminate once every 5 seconds
While playing: Indicator lights illuminate once every 5 seconds
Double-tap
R
L
Specs
1. Bluetooth Version： Bluetooth V5.0
2. Input Power：5.0V 380mA
3. Charging time：< 2h
KOSS TWS150i
0：35
While earbuds are in an off state, touch and hold the touch strip of
both earbuds for about 3 seconds, lights will iluminate for 1 second
to show the earbuds are powered on.
* Protective film must be removed from earbuds
before they can be powered on and paired
Problem: If Bluetooth on source device is turned off, the earbuds will
automatically turn off after 10 minutes. If earbuds are disconnected,
the L/R earbuds’ red and white lights will flash alternately.
Solution: Make sure that the source device’s Bluetooth is turned on;
then power on earbuds again.
Problem: If the connection between the device and the earbuds
exceeds the effective range, the earbuds will power off automatically
after 10 minutes.
Solution: Make sure that device is in range, then power on earbuds.
Bluetooth Earbuds
INSTRUCTIONS
R
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions:(1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.Any Changes or
modifications not expressly approved by the party responsible for compliance could void the user's
authority to operate the equipment.
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates uses and can radiate radio frequency energy and, if
not installed and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular
installation.If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
-Reorient or relocate the receiving antenna.
-Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
-Consult the dealer or an experienced radio/TV technician for help.
The device has been evaluated to meet general RF exposure requirement.
The device can be used in portable exposure condition without restriction.
L76-KSTWS520I