Features 1.Wireless listen to to music with integrated Bluetooth technology 2.Fashion design let music surrounding your life any time 3.Hands free function truly free your hand 4.Support power displaying on cellphone easy to know when will to be charged 5.Sound reminder function easy to set the device according to sound remind Specification Description:This motorcycle helmet headsetis a necessity for riders of motorbikes quads bicycles etc. It will help you get phone callings conveniently and listen music without much noises. You deserve it!Features:Wireless listen to to music with integrated Bluetooth technology. Fashion design let music surrounding your life any time. Hands free function truly free your hand. Set-in rechargeable Li-ion battery long stand-by and working time. With CSR chip and Bluetooth 4.0 technology Hi-Fi earphone. Support power displaying on cellphone easy to know when will to be charged. DIY design available to be detachable when you want. Sound reminder function easy to set the device according to sound remind. Specifications:Material: PlasticColor: BlackBluetooth Version: 4.0 + CSR ChipFrequency: 2.402GHZ - 2.480GHZDistance: approx. 10mTransmission Distance of Microphone: < 1mBattery Capacity: 3.7V / 150mAPlaytime: <= 8 hoursCharging Time: about 1 hourLength of Line: 450mm/17.7Package Weight: approx. 154gPackage Included:1 x Helmet Bluetooth Headset1 x USB Cable1 x User Manual Package List