Detailed Product Description"Stereo
Bluetooth Headset (CSR) Appliant to Version 2.0
Transmitter Power: Class 2
Operation Distance: Within 10m
Frequency range: 2.4026-2.480GHz
Embedded rechargable Li-batteries:450mAh
Charger output Spec.: 5.0V(300mA)
Normal charging time: 3.5~4 hrs
Calling time: 12hrs
Music Time: 10hrs
Standby time: 200hrs
Headset Size: 128*73.2*38mm
Weight: 67.8 g "