ParameterSpecificationBluetooth Version5 0Bluetooth ProtocolAGHSPBluetooth SolutionBlue messageBluetooth Transmission Distance10 metersHeadphone ChannelStereo 2 0 Music Playback TimeMaximum sound 7H Medium volume 10 hoursMicrophone Distance1 meterBluetooth Standby Time72HBattery Capacity180ma hBattery Power0 55WHorn Impedance32 ohmsHorn Power0 02WFrequency Range2 4 2 4835GHzSensitivity45dBTransmission Power6dBAudio Output Distortion0 6 Audio Output Signal to Noise Ratio93dBCharging Time1 2 hoursMaximum Input VoltageDC 5VMaximum Input Current150mahMaximum Input Power0 55W