Remote Controller. Features: Integrates an upgraded Lightbridge HD video transmission system that adds 5.8 GHz transmission support. The ability to choose between 2.4Ghz and 5.8Ghz allows pilots to cut through interference and eliminates image lag caused when flying in an area with extensive 2.4Ghz frequency use. This ensures the optimum range of a maximum video transmission of 7km (ECC). Compatibility: Phantom 4 Pro.