1. Direct full-duplex intercom between rider & passenger or two riders up to 800m 
2. Three riders connected, two people toggle intercom 
3. Conduct calls on their mobile phone, such as: receive a cell phone call automatically,call out, call answer, call reject, call hang up, last number redial & voice dialing 
4. Automatic switching among mobile call, intercom and stereo music, mobile call first, automatically switch to the previous status after hanging up 
5. Enjoy the music through bluetooth enable cell phone / MP3 / GPS 
6. The music can be controlled via AVRCP, such as play, pause, privious song, next song played 
7. With DSP echo cancellation and noise suppression technology, crystal clear voice quality is guaranteed in a high speed 
8. Button panel is water-proof and sun-proof, while the design is durable