Helmet Intercom - Headset Motorcycle Bluetooth Intercom 8 Rider 2000M Interphonehelmet intercom motorcycle helmet bluetooth headset 8 riders 2000M group BT 5. 0 Interphone music sharing with FM Radio Note: if you want to talk with others,you need to buy at least two this intercom. Features 1. the distance can reach 500 meters (for two riders), 2000 meters (for groups),up to 120km h working speed. 2. Support 8 peoples talk at the same time. 3. Support Music sharing(only between two device),Music sharing and talking could not be at