Features 1.Hands Free: Helmet Bluetooth headset uses Bluetooth 5.0 to support all cell phones with Bluetooth, built in anti jamming microphone, automatically answer the phone, truly free your hands, improve riding safety factor safer and more convenient. Large press button, simple function control, more convenient operation. 2.Multifunctional: Motorcycle helmet Bluetooth headset has GPS navigation, hands free calling, music and voice helper functions, can connect 2 cell phones, etc.; with 500mAh rechargeable lithium ion battery, play time: 15?20 hours; standby time: 240 hours; charging time: 3 hours. 3.Adjustable Volume: Motorcycle Bluetooth headset has excellent signal transmission, ultra low power consumption, and is compatible with all Bluetooth devices. Volume upgrade technology allows you to easily adjust the desired volume. Support previous song or next song function, volume up or down, play pause, automatic callback and other functions, easy to operate. 4.Noise Reduction: helmet headset with built in intelligent chip and external professional windproof microphone. Effectively reduce background noise, allowing you to enjoy stereo sound and HiFi sound quality while riding. Deep bass and crisp treble response can be a perfect solution to the problem of not hearing the headset sound while riding. 5.IP67 Waterproof: Helmet speakers with IP67 waterproof, even in rainy or snowy days can be used without worry. Suitable for any full helmet and most half helmets, large buttons, even with gloves can be easily operated, very convenient for motorcycle driving, bike riding, snowboarding, skiing, etc. specificationItem Type: Motorcycle Bluetooth Headset Material: ABS Microphone Cotton: Approx. 13.5 x 43mm/0.53 x 1.69in Bluetooth Version: 5.0 Frequency Range: 2.402GHz-2.480GHz Transmission Distance: Approx. 10-15m/32.8-49.2ft (Depending on the Device) Mic Distance: 1m/3.3ft Battery: 500mAh Lithium Battery (included) Playback Time: 15-20 Hours Standby Time: 240 Hours Charging Time: 3 Hours Waterproof Rating: IP67 PackageList 1 x Moto Bluetooth Headset 1 x Charging Cable 1 x Instruction Manual 2 x Screw 2 x Nut 1 x Bracket 1 x Spare Microphone Cotton 4 x Hook and Loop NotePlease allow some errors due to manual measurement.