Use receivers together with the FA-WRC1M Wireless Radio Commander to wirelessly control up to 15 flash units in 5 groupsCommunication distance: Approximately 30 m (98.4 ft.)Use separate Multi Terminal Cable to connect receivers to cameras for remote multi-camera shutter triggering from the Wireless CommanderBuilt-in Sync TerminalThis product is designed for use with Multi Interface Shoe flashes. (except HVL-F20M)Use receivers together with the FA-WRC1M Wireless Radio Commander to wirelessly control up to 15 flash units in 5 groupsCommunication distance: Approximately 30 m (98.4 ft.)Use separate Multi Terminal Cable to connect receivers to cameras for remote multi-camera shutter triggering from the Wireless CommanderBuilt-in Sync TerminalThis product is designed for use with Multi Interface Shoe flashes. (except HVL-F20M)