Powerful long-distance transmission: the digital radio 30KM long-distance transmission capability, suitable for application scenario that require long-distance communication Strong substitutability: as a substitute for RFD900, good compatibility, can be quickly replaced and provide more functions Highly Communication: Supports stable and fast data transmission, suitable for communication needs in various complex environment Powerful transmission: adopts powerful transmission technology ensures stable transmission and reduce loss or interferences Digital transmission function: with data transmission function, it can realise accurate positioning and data transmission, and improve navigation and control accuracy