1) Compliance with Bluetooth 2.0 with A2DP, AVRCP, HFP and HSP 2) Frequency range: 2.402 ~ 2.480GHz 3) Transmission output power: 0.25 ~ 2.5mW 4) Maximum cordless distance: 30 feet (10 meters) 5) Dimension of headset: 28pie x 16.4 6) Weight of headset: 20g 7) Relative humidity: 0 ~ 95% 8) Typical standby time: 180 hours 9) Typical talk time: 15 hours 10) Typical play time: 10 hours 11) Battery type rechargeable poly battery 12) Charger rated input: AC 100 ~ 240V, 50 / 60Hz 13) Charger rated output: DC 4.2V, 400mAh