Koss TWS250i - True Wireless Earbuds Manual

In the Box

Pairing

1. For first use, hold the touch surfaces of both the left and right earbuds for 2 seconds or more
   
2. The earbuds will power on and enter pairing mode (shown with blue and red flashing LEDs)
   

Connecting To Bluetooth Device

1. Choose "KOSS TWS250i" to connect
   
2. 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

1. Phone call
   
2. Music
   
3. Voice assistant
   Triple tap to prompt the voice assistant
   
4. Power off
   Return earbuds to case to automatically power off or touch & hold earbuds for 5 seconds to manually power off
   

Light Language

Charging

1. Plug charging case into power source with supplied cable
   
2. 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

Factory Reset

1. Put the earbuds into the charging case
2. Press and hold the earbuds for 5 seconds to power them off
3. Press and hold the earbuds for 8 seconds
4. Close charging case lid
5. Factory reset complete

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
Bluetooth Version: V5.0
DC input: 5V=280mA
Case Battery Capacity: 300mAh, 1.11Wh
Combined Earbud Battery Capacity: 100mAh, 0.37Wh
Made in China

Safety

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.