... 4.Factory pric up to 6 riders 1000m mobile phone bluetooth intercom 1.bluetooth 1000 meters 2.factory OEM,ODM 3. ... ~3hrs Chip brand: CSR Brief Description:1.Long range-1000 meters intercom, Bluetooth interphone kits for helmet motorcycle, Snowmobile, ski, ... unit)15.Plastic + Rubber button, more stable structure, better waterproof performance. This system is fully weather protected.16. Wireless hands ...