Keywords: HT4186, NB16, headphone, cellphone, smart phone
Headphone NB16 can be separately used with cellphone, refer to this link for step-by-step instruction pls：
Pair and connect
- Set headset to PAIRING MODE - From off status, hold for about 5 seconds until LED flashes BLUE and RED alternately.
- Activate Bluetooth on your device, search and select “Avantree HT4186” to connect. Once connected, LED will flash BLUE every 5s, you will hear a voice prompt “Your device is connected”.
Normally, when turning headset on, it will automatically reconnect to the last paired device. Otherwise, please connect it on the phone manually.