Need help?Do you have a question about the Koss BT221i and is the answer not in the manual?
To enter Bluetooth discovery mode, press and hold the center button until the light flashes red and blue.
Use +/- buttons for volume; long press for next/previous track.
Single press the center button for play/pause/answer/terminate calls.
Long press the center button to power the device on or off.
Avoid heat, liquid, extreme temperatures, dropping, disassembly, fire disposal, and charging while wet.
Do not leave or store devices near automobile airbags to prevent serious injury.
General| Ear coupling | Supraaural |
|---|---|
| Headphone frequency | 50 - 18000 Hz |
| Headphone sensitivity | 101 dB |
| Battery type | Built-in battery |
| Rechargeable battery | Yes |
| Continuous audio playback time | 6 h |
| 3.5 mm connector | No |
| Bluetooth version | 4.2 |
| Connectivity technology | Wireless |
| Headset type | Binaural |
| Product type | Headset |
| Product color | Black, Blue |
| Wearing style | Ear-hook |
| Volume control | Buttons |
| Recommended usage | Sports |
| Buttons quantity | 3 |
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