KOSS TWS250i True Wireless Earbuds User Guide
- June 3, 2024
- KOSS
Table of Contents
KOSS TWS250i True Wireless Earbuds
In the Box
Pairing
- For first use, hold the touch surfaces of both the left and right earbuds for 2 seconds or more.
- The earbuds will power on and enter pairing mode (shown with blue and red flashing LEDs).
Connecting To Bluetooth Device
- Choose “KOSS TWS250i” to connect
- Pairing successful
Note: earbuds will automatically connect to your device after initial connection as long as Bluetooth is on.
Touch Controls
Touch button functions and indications
Note: “t” is for tap and “Hold” is for touch and hold in the images below
-
Phone call
-
Music
-
Voice assistant
Triple tap to prompt the voice assistant -
Power off
Return earbuds to case to automatically power off or touch & hold earbuds for 5 seconds to manually power off.
Light Language
Earbud Light Language
Charging Case Light Language
Charging
- Plug charging case into power source with supplied cable
- When earbuds are in the charging case the light indicates that charging is in progress. The red light turns off when charging is complete.
Reset
Step 1: Make sure both earbuds are in the charging case, touch & hold
both earbud for 5 seconds to power off
Step 2: Touch & hold both earbuds for 8 seconds while they are in
charging case and while powered off
- The red light flashes for 4 seconds and a warning tone of two beeps occurs during this process
Pairing process begins again
Product Specifications
Lithium Ion Batteries:
Model: 602030 , 3.7V , 300mAh
YJ POWER GROUP LIMITED
2F.B6 Building Tianrui Industrial Zone,Fuyuanyi Road,
Fuyong Town, Baoan District, Shen Zhen, China
Model:581013 , 3.7V , 50mAh
DongGuan Nengyou Energy Science and Technology Co.,Ltd.
Building B,No.353, QingFeng Road,SanZhong Village,
QingXi Town,DongGuan City,GuangDong Province.
Use this product in an environment with a temperature between 0℃ and 45℃; otherwise, it may become damaged.
KOSS Corporation
Model: KOSS TWS250i
Hereby declares that Bluetooth Headset, Model: KOSS
TWS250i is in compliance with the essential requirements
and other relevant provisions of directive 2014/53/EU.
KOSS Corporation
Model: KOSS TWS250i
Bluetooth Version: V5.0
DC input: 5V=280mA
Case Battery Capacity：300mAh 1.11Wh
Combined Earbud Battery Capacity：100mAh 0.37Wh
Made in China
WARNING
Using earbuds at high volumes for extended periods of time may result in
permanent hearing damage. It is advised you keep volume levels moderate 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.
Liquid submersion voids the warranty.
Keep the earbuds and packaging out of reach of children.
Battery warning
- 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.
- 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.
The Directive on Waste Electrical and Electronic Equipment (WEEE), which
entered into force as European law on 14/02/2014, resulted in a major change
in the treatment of electrical equipment at end-of-life.
The purpose of the Directive is, as a first priority, the prevention of
WEEE, and in addition, to promote the reuse, recycling and other forms of
recovery of such wastes so as to reduce disposal.
The WEEE logo on the product or on its box indication collection for
electrical and electronic equipment consist of the crossed-out wheeled bin, as
shown below.
FCC Warning
This device contains license-exempt transmitter(s)/receiver(s) that 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.
FCC RF exposure statement:
The equipment complies with FCC Radiation exposure limit set forth for
uncontrolled environments.
This equipment should be installed and operated with minimum distance 20cm
between the radiator and your body.