Full-duplex intercomUpgraded version, more stable connection, can connect to other brands, maximum ideal speed 80km/h~120km/h, the longest straight line distance 800-1000M. Bluetooth connects to mobile phones, can automatically answer, reject, hang up the phone, and supports last redial. Mobile phones and intercoms can be connected via audio cables[Intelligent noise reduction] Adopts DSP intelligent noise reduction and wind noise processing to ensure high-speed sound quality and clarity. Supports FM radio function MP3, GPS, enjoys mobile phone music through A2DP or connects to GPS, and controls the previous and next songs of mobile phone music through AVRCP, and pauses playback[Large buttons, easy to install] The buttons are large, suitable for wearing gloves, easy to operate, can be installed on full-face and half-face helmets, and can cover the ears. Both the headphones and helmets are snap-on, easy to remove and install[Super waterproof] Perfect panel sealing design, water flushing test, can be used in rain and snow, making your outdoor riding easier and more enjoyable