Vnetphone V8 Remote Interphone with Headset Remote Controller Handlebar transmit distance Barrier-free Max.10m NFC function, wireless communication from close range. FM radio function Up to 1200m Bluetooth distance. Support 5 people talk at the same time, fully duplex Call out, call answer, call reject, call hang up. Safe auto-receiving cellphone calls. 5 grade waterproof. Works with any Bluetooth equipped mobile phone, GPS or MP3 Stereo music