Feature:1. BLUETOOTH 5.0 TECHNOLOGY: Helmet headset uses bluetooth 5.0 technology standard for stable transmission, wider coverage, faster speed and lower power consumption.2. ONE BUTTON FOR CLEAR CALLS: Helmet bluetooth headset has built in noise cancellation technology, presenting hifi stereo sound effect and clear calls with one click.3. 4 BUTTON DESIGN: Motorcycle helmet headphones are designed with 4 keys, simple music control and dialing, more convenient operation.4. HANDS FREE: Motorcycle helmets headset automatically answers incoming calls, no need to get the phone to answer calls, safer and more convenient.5. LONG STANDBY TIME: Helmet bluetooth headphone has a built in 450mAh rechargeable lithium ion battery for long standby time and long working time.6. SMALL AND SIMPLE: Motorcycle sports headset is compact, simple and elegant, and the installation is not cumbersome, and the comfortable lacquered shell makes people love it.Specification:Item Type: Helmet Bluetooth HeadsetModel: DK11Material: ABSColor: BlackBattery Type: Built In 450mAh Lithium Battery (Included)Bluetooth Version: 5.0Frequency: 2.402-2.480GHzBluetooth Range: Approx. 20-30m / 65.6-98.4ft.Package List:1 xHelmet Bluetooth Headset2 x Hook and Hoop Fasteners2 x Sticker1 x Charging Cable1 x Instruction Book