Item Type: Helmet Bluetooth HeadsetMaterial: ABSModel: BT22Color: BlackBattery Type: Built in 820mAh Lithium Battery (included)Bluetooth Version: 5.0Frequency: 2.402-2.480GHzBluetooth Range: 20-30m/65.6-98.4ftPackage List1 x Helmet Bluetooth Headset1 x Headset Controller1 x Charging Cable1 x Manual1Bluetooth 5.0 Features: Helmet bluetooth headphones use Bluetooth 5.0 technology standard, stable transmission, wider coverage, faster speed and lower power consumption. 2Automatic Call Answering: Helmet bluetooth headset answer calls without reaching for the phone, automatically answer incoming calls, safer and more convenient. 3Three Keys Design: Helmet bluetooth headset is designed with three keys, simple music control and simple dialing, more convenient operation. 4820mah Rechargeable Battery: The helmet bluetooth headset has a built in 820mAh rechargeable lithium ion battery for long standby time and long working time. 5Noise Reduction, Clear Calls: With built in noise and back sound cancellation technology, helmet bluetooth headset presents high definition stereo sound effect and clear call with one key. 6Simple and Beautiful: Bluetooth 5.0 motorcycle helmet headset is compact, simple and elegant, installation is not cumbersome, comfortable hand feeling lacquered shell.