Feature:1. Since the headset is hung on the helmet, our earphones are slimmer than the builtin type (the battery is on the earphone) and will not squeeze the ears, bringing you a more comfortable experience.2. The host contains a larger capacity battery, up to 450mAh, (builtin approximately 250mAh), which makes the standby time and working time of the whole machine longer.3. Equipped with a smart CSR chip and an external professional windproof microphone. Focus on reducing the echo generated by riding, suppress various reverberation noises, and effectively reduce background noise.4. Use a highpower audio amplifier to make the audio volume range larger, and will not affect music playback and phone answering in the noise environment of high speed riding.5. The helmet Bluetooth headset allows you to answer calls safely. Hands free function, truly free your hands. When riding a motorcycle, don't worry about missing any calls.6. Connect two mobile devices at the same time, freely choose one device to switch, navigation, listening to songs, and answering calls will not be delayed.Specification:Item Type: Motorbike EarpieceModel: QTB35Bluetooth Version: 5.0+EDR CSR8635Support Protocol: A2DP and AVRCPFrequency: 2.4GHzAmplifier: HT4832SQBattery Capacity: 450mAh Lithium Battery (Included)Charging Voltage/Current: DV 5V/350mAWorking Time: About 10 hoursMobile Phone Connection Distance: Approx. 50m / 164ft.Package List:1 x Headset 1 x Earphone with Mic1 x Charging Cable2 x Hook and Loop2 x Screw1 x Screwdriver1 x Buckle1 x Manual