Battery capacity: 300mAh, 5V / 1AHeadphones: 40mAh * 2 5V / 1ACharging room charging time: about 1 hourEndurance: about 6 timesFrequency response range: 20Hz-20KHzSensitivity: 100±3dB / 6MWTransmission distance: 10 metersBluetooth version 5.0Transmission distance support protocol HSP / HFP / A2DP / AVRCPLife time: The talk time is about 4-5 hours.Item No. :B5 touchFunction: battery display, voice control, call function, support musicBluetooth protocol: 5.0Channel: StereoHow to use : EarbudsWhether single or both ears: bilateral stereoColor: English neutral black touch double pass