Wreless Version: V5.1+ EDR Wireless Frequency: 2.4Ghz Transmission distance: 15m Charging Voltage/Curtent: 5V/1A Standby time: 120hours. Working temperature: -10-50°C Hon impedance: c13.2 mm 3202 Support protocol: A2DP13/HF01.6/HSP1.2/AVRCP 1.6/D11.3