Nikon SC-29 TTL Remote Cord provides full TTL control for Nikon Speelights when operated off camera with Nikon hot shoe ready D-SLRs. The SC-29 employs built-in AF-Assist Illuminator for low light situations. The cord is mounted to the camera's hot shoe and attaches to the Speedlight on the opposite end. The SC-29 is compatible with Nikon SB-800, SB-500 AF Speedlight, SB-910 AF Speedlight, SB-700 AF Speedlight, SB-900 AF Speedlight, SB-600 AF Speedlight, AB-R200 Wireless Speedlight, SU-800 Wireless Speedlight Commander, SB-400 Speedlight Unit, Nikon D800E and Nikon D800.