Nikon SC-28 TTL Remote Cord provides complete TTL control for Nikon Speedlights when used off-camera with select Nikon DSLRs that employs TTL hot shoe. The cord is mounted to the camera's hot shoe and the opposite end attaches to the Speedlight mounted on a bracket. The SC-29 is compatible with Nikon Coolpix A, SB-800, SB-500 AF Speedlight, SB-910 AF Speedlight, SB-700 AF Speedlight, SB-900 AF Speedlight, SB-600 AF Speedlight, SB-R200 Wireless Speedlight, SU-800 Wireless Speedlight Commander, SB-400 Speedlight Unit, Nikon D800E and Nikon D800.