Features: 1.Auto Connect: If your phone or Bluetooth device has a connection history with the headset, you can switch it on again and quickly connect your Bluetooth directly without re pairing. Auto search: When the phone BT is disconnected from the headset (voice indication that it has been disconnected), it will go into auto search pairing mode. 2.Play Pause: Press the power button to pause the song, then press the power button again to resume the song. Press the B button twice in succession to turn on the light. Automatic battery level display. 3.Talking Assistant: When connected to the phone, press the B button once to activate the talking assistant. It will automatically exit after a few seconds of stopping the conversation. 4.Answer Call: Report the caller's phone number and then answer the call automatically or simply press the multifunction knob to answer the call. Hanging up: Press the power button to hanging up. Reject call: Press and hold the power button for 2 seconds after an incoming call to reject the call Re dial function: Press the power button twice to re dial the last phone number. 5.Power Saving Mode: If the device is in standby mode, pairing will automatically switch off after 5 minutes Low battery warning: the device will alert. Specification: Item Type: Motorcycle Helmet Headset_x000D_ Product Material: ABS_x000D_ Bluetooth Version: 5.0_x000D_ Frequency: 2.402GHz-2.480GHZ_x000D_ Range: Approx.10-15m / 10.9- 16.4yd (Depending On The Device)_x000D_ Microphone Transmission Distance: 1m_x000D_ Built in Li ion Battery: 3.7V / 1000mAh_x000D_ Endurance: 30-40 Hours_x000D_ Charging Voltage: 5V_x000D_ Charging Time: 5 Hours_x000D_ Standby Time: 300 Hours_x000D_ Bluetooh Name: BT31