1Auto 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. 2Play 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. 3Talking 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. 4Answer 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. 5Power Saving Mode: If the device is in standby mode, pairing will automatically switch off after 5 minutes Low battery warning: the device will alert.