The nikon su 800 wireless speedlight commander controls multiple flash units in your creative lighting system via the built in lcd display on the rear removing the need for separate cables or flash meters and giving you accurate control of all automatic exposures in any lighting conditions the su 800 can control any number of i ttl creative lighting system speedlights like the sb 800 or sb 600 or the dedicated sb r200 remote speedlight for close up photography to deliver an entirely new dime