Main functions:

This machine is a bluetooth device, which can connect to other bluetooth devices such as mobile phone, desktop computer, laptop, PDA, etc. Comfortable to wear, with all the lenses covered,
Streamline appearance design is unique, practical in skiing, mountain climbing, mountain racing car, sailing, driving, etc., high fidelity stereo speakers, the volume of up to 85 decibels, and the joy of the game of high quality music,
Built-in lithium battery.
Technical parameters:
Operating frequency range: 2.402GHz-2.480GHz
Meet bluetooth V3.0 standards
Wireless connection range :8 m
Transmitting power :Glass2
Support Headset& Handsfree Profiles

The earphone has a built-in rechargeable lithium-ion battery of 120mAH