Feature 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.SpecificationItem Type: Motorcycle Helmet HeadsetProduct Material: ABSBluetooth Version: 5.0Frequency: 2.402GHz-2.480GHZRange: Approx.10-15m / 10.9- 16.4yd (Depending On The Device)Microphone Transmission Distance: 1mBuilt in Li ion Battery: 3.7V / 1000mAhEndurance: 30-40 HoursCharging Voltage: 5VCharging Time: 5 HoursStandby Time: 300 HoursBluetooh Name: BT31 .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Bluetooth Headset1 x Microphone1 x Harness5 x Accessories1 x User Manual