Feratures: 1. The new generation of bone conduction helmet earphone completely solves the problem of inconvenience to answer the phone while wearing the helmet. While it is convenient to answer the phone, it does not prevent you from hearing outside sounds.2. Voice control function makes driving more hassle-free, music mode enhances driving fun. Earless design completely solves the problems of bulging, falling and hearing damage.3. Bluetooth function: BT5.0 chipset can connect to any BT-enabled GPS device, as well as mobile phones. Specification: Model: E50 Connect to garden fan: 10m/Bluetooth Weight: 50g Transmission mode: bone conduction Battery capacity: 380mah Playing time: 10h Material: ABS Color : Black Package includes: 1 * helmet with headset 1 * microphone cable 1 * charging cable 1 * manual and some stickers The bone conduction helmet audio equipment is an innovative improvement based on the traditional helmet audio equipment. Small and portable, easy to use. 5.0 Bluetooth connection is more stable, IP68 dustproof and waterproof, support intercom, wireless music. Lets you enjoy radio quality sound while driving at speed. Let you and your motorcycle teammates experience the best sense of use in team activities.