Nikon 4794 SU-800 Wireless Speedlight Functions as a wireless commander for the SB-R200, SB-900, SB-800, SB-700 and SB-600 Speedlight units. Supports the Nikon Creative Lighting System (CLS) and compatible CLS cameras. Offers 4 independent channels for competitive shooting environments. Fully transferable with gifts. Cancel anytime, full refund in the first 30 days