1) Bluetooth: Compliant with Bluetooth V1.1. 2) Battery: Lithium 3) Operating range: 10 meter 4) Talking -time: 4hours 5) Standing time: 75hours 6) Voice command: For dialing out (subject to mobile phone support) 5) frequency:2.4-2.4825GHz 6) frequency hoping:1600 hops/second 7) operation distance: up to 10 meters 8) audio frequency range:300-3400Hz 9) rechargeable battery:Li-lon,3.6V and 200mAh 10) battery current in operation mode:< 70mA 11)battery current in standard mode:<1mA 12) FCC/CE approved 13) Weight: 16g 14) Size:5.5*2.9*1 cm