BlattWorld, Item Details: Nikon NIKON SU-800 Wireless Speedlight Commander

Functions as a wireless commander for the SB-R200, SB-800 and SB-600 Speedlight units.
Supports the Nikon Creative Lighting System (CLS) and compatible CLS cameras.
Controls an unlimited number of Speedlights for up to three groups.
Offers 4 independent channels for competitive shooting environments.
Provides wireless control up to 66 feet.
Built-in AF assists illuminator for critical focus in low-light situations

Features

Functions as a wireless commander for the SB-R200, SB-800 and SB-600 Speedlight units.
Supports the Nikon Creative Lighting System (CLS) and compatible CLS cameras.
Controls an unlimited number of Speedlights for up to three groups.
Offers 4 independent channels for competitive shooting environments.
Provides wireless control up to 66 feet.
Built-in AF assists illuminator for critical focus in low-light situations