1. Bluetooth Version:1.2 2. Working Distance Range : 10M 3. Frequency Range : 2.4026GHz-2.480GHz 4. Rechargeable Battery : Lithium polymer, 550mAh 5. Output Voltage:5.0V(type350mA) 6. Charge Time: 3-4 hours ; Talk Time: 14 hours 7. Listen Time: 12 hours ; Standby Time: Up to 200 hours 8. Headset Size(Folded): 128.3(L) x 73.2(W) x 38(Thickness)mm 9. Weight(main unit): 67.8g