Specification :

Bluetooth Core: V2.1+ EDR
Bluetooth Program: ISSC+ Class2
Standby time: e 100hours
Talk time: 6hours
Charging Time: 2-3 hour
Standby Current: 0.7-1mA
Batery Capacity: 48mA/ h
Wireless Frequency Range: 2.4G
Transmission Power: 0 dbm
Transmission Distance: 10M
Environment Temperature: -20/ + 60 
Operating Voltage: 3.7V