Place your order by 4:00 PM EDT Tuesday, May 31 and your order will ship the same day. For further details see delivery estimates in cart. All orders are subject to verification. International orders are processed the next shipping day.
The Nikon SU-4 Wireless TTL Slave Flash Controller enables wireless remote TTL slave flash with any current Nikon Speedlight. The SU-4 detects the firing of the master flash (including built-in pop-up flash) on Nikon cameras, and sends a firing start signal to the slaved unit. The SU-4 stops the firing of the slaved flash by detecting the firing stop of the master flash. Use of SU-4's eliminates connecting cords. Operates up to approximately 23' from the location of the main flash.