Compatible with interchangeable cameras and external flash units, Wireless Lighting Control System includes FA-WRC1M wireless radio commander as well as FA-WRR1 wireless radio receiver. With max range of 98 ft, system can control 15 separate flash units in up to 5 groups of flashes. It is capable of flash sync speeds of up to 1/250th of a second with high speed sync also available. Depending on preference, photographers can control exposure of connected flash units manually or automatically.