up to 6 riders bluetooth intercom headset 1.bluetooth 1000 meters 2.factory OEM,ODM 3.mp3/GPS/mobiles 4.Factory price up to 6 riders 1000m bluetooth intercom headset 1.bluetooth 1000 meters 2.factory OEM,ODM ... meters intercom, Bluetooth interphone kits for helmet motorcycle, Snowmobile, ski, ATV etc.2.communication system 6 Riders.3.1000m maximum intercom range4.Up to 120km/h speed5.Up to 7hours ...