This radio system works in the frequency range of 2.4000 to 2.4835GHz. The transmitter can storage 20 models and every model binding condition. Free software can be upgraded online and system can be updated by fast-easy way. Adopt latest two-way communication system and all the FS- receivers can be compatible with this transmitter Double antenna structure makes 2.4G frequency module signal smoothly transmiss at all direction and signal safer