1) BT protocol: version 2.0
2) Frequency: 2.4 GHz
3) BT range: 10meters.
4) Net weight: 14g
5) Power supply:DC5.1V/120Ma
6) Working volt: 3.7V 7) Battery:  rechargeable Li-Ion  battery
8) Talking time:up to  5.5 hours 
9) Standby time: up to 120 hours 
10) Charging time: about 2 hours.