Bluetooth stereo headset Standard Bluetooth V1.2 Range 10 meters (33 feet) Frequency 2.4GHz~2.48GHz ISM Band Profiles Supported A2DP , Headset, Handsfree Weight 25g (including battery) Dimension 57(L)* 19(W)* 23(H) mm Talk time Up to 5 hr Standby time Up to 120 hR Stereo Playback Time Up to 5 hr Battery Rechargeable Li-ion polymer 120mAh Charging 5V DC, 100~240V AC adapter