1、The speed is up to 120 km/h, the call lasted 8 hours. 2、Receives mobile phone automatically, free your hand. 3、It also has function: mobile / mp3 / stereo music, audio navigation from GPS, online audio interface, DSP wind noise elimination. 4、With plastic and rubber material, it is stable and water proof. 5、1200 meters interphone is suitable for motorcycle helmet, snowmobile, snowboard, beach bike. This bluetooth intercom is compact and convenient. Make your life with more fun. Featuring automatic answering, listen to stereo music, and operate easily, also can keep them safe while riding. Features: 1. The speed is up to 120 km/h, the call lasted 8 hours. 2. Receives mobile phone automatically, free your hand. 3. It also has function: mobile / mp3 / stereo music, audio navigation from GPS, online audio interface, DSP wind noise elimination. 4. With plastic and rubber material, it is stable and water proof. 5. 1200 meters interphone is suitable for motorcycle helmet, snowmobile, snowboard, beach bike. 6. It can be used as a bluetooth headset and wireless music headset when you are not cycling. 7. Provide wireless hands-free communication for motorcyclists. Specification: Maximum Number of Speakers: 6 Special Function: Noise reduction, Waterproof Talk Time: up to 8 hours Working Speed: up to 120 km/h Maximum Communication Distance: > 1000m Connection Mode: Bluetooth Maximum Support: 6 People Maximum Range: 1200M Stereo music/audio: Support A2DP phone/MP3 / GPS Frequency: 2.4 GHz Interphone: Motorcycle Bluetooth Interphone Waterproof : IP65 HD call 1 x Bluetooth Intercom 1 x Headset 1 x USB Cable 1 x Instruction 3 x Cotton Stick 1 x Clamp1 x Base 1 x Bracket 1 x Screwdriver 2 x Screws 1 x Headset