BTH-300 Dimension: 65mm X 30mm X 12mm Weight: 21.6g(not included the earphone) Version: 3.0 Profiles: HSP, HFP, A2DP, AVRCP R.F. Spec: Class 2 Power: 6dB Sensitivity: -90d Range: (typical): 10 meters Built-in Battery 190mAH Standby Current: 6mA Standby Time :35hours Average Talk Time 8 hours Operating Temp. Range -15° C to +50° C