User Manual

Charging the battery

• Fully charge the battery when using for the first time.

• When the rechargeable battery is running low, the product will emit a low battery level warning sound through the

headphones, and the indicator lamp will flash in red. In this case, charge the battery.

• It takes about 2 hours maximum to charge the battery fully. (This time may vary depending on usage conditions.)

• Charge the product in a well-ventilated place (10 to 35 °C) away from direct sunlight. Otherwise, the battery may

deteriorate, possibly resulting in shorter periods of continuous use or failure to charge.

1. Open the battery jack cover.

2. Connect the included USB charging cable (USB Type-C side) to the battery jack.

• The included USB charging cable is designed for exclusive use with the product. Do not use any other USB

charging cable.

• When inserting the USB charging cable into the USB port or battery jack, insert it straight (horizontally).

Battery jack

USB port

USB Type-A

USB charging cable

(Included)

USB Type-C

Computer

3. Connect the included USB charging cable (USB Type-A side) to the computer to start charging.

• While charging, the indicator lamp lights as follows (it may take several seconds for the indicator lamp to light).

Lit in red : Charging

Off : Charging complete

Flashing in red : Charging error (Charge the product in a well-ventilated place (10 to 35 °C) away from direct

sunlight.

4. When charging is complete, disconnect the USB charging cable (USB Type-A side) from the computer.

5. Disconnect the USB charging cable (USB Type-C side) from the battery jack and close the cover firmly.

• If you start to charge while the product is on, it will turn off while charging.

• When charging, make sure to use the included USB charging cable. The product may not charge with cables

other than the included USB charging cable.