Features 1.HD Calling: Helmet Bluetooth headset has clear sound quality, built in noise cancellation technology, presenting HD stereo sound effect and clear calling with one click. 2.Hands Free: Motorcycle helmet headset answers calls without reaching for the phone, automatically answering incoming calls, safer and more convenient. 3.Small and Beautiful: Motorcycle sports headset is small, simple and elegant, easy to wear, and the lacquered shell feels comfortable in your hand, so you can't help but love it. 4.Button Design: Helmet headphone comes with 4 buttons designed on the microphone, simple music control and dialing, more convenient operation. 5.Rechargeable Battery: Motorcycle helmet headphone has a built in 250mAh rechargeable lithium ion battery for long standby time and long working time. 6.Advanced Technology: Helmet headset adopts Bluetooth 4.0 technology standard, stable transmission, wider coverage, faster speed and lower power consumption. Specification Item Type: Motorcycle Helmet Bluetooth HeadsetModel: BT14Material: ABSColor: BlackBattery Type: Buil in 250mAh Lithium Battery (Included)Bluetooth Version: 4.0, EDR,CSRFrequency: 2.402-2.480GHzBluetooth Range: Approx. 20-30m/65.6-98.4ft Package List 1 xHelmetBluetoothHeadset1 x Charging Cable1 x Instruction Manual