M7 Wireless Headset Bluetooth-compatible 5.0 Stereo Waterproof Automatic Answering With Fm Radio Function Helmet Earphone black

--After installing the headset to the helmet, with the help of wireless technology, it can answer calls, control the state of playing music, etc..

--Frequency range: 2.402GHz~2.480GHz.

--BT distance: 20~30m (varies by mobile phone).

--Lithium battery capacity: 3.7V/500mAh.

--Charging time: about 2 hours; Standby time: about 360 hours.

--After installing the headset to the helmet, with the help of wireless technology, it can answer calls, control the state of playing music, etc..

--Frequency range: 2.402GHz~2.480GHz.

--BT distance: 20~30m (varies by mobile phone).

--Lithium battery capacity: 3.7V/500mAh.

--Charging time: about 2 hours; Standby time: about 360 hours.