Camera Flash, Manual, TTL, I-TTL (Nikon)
From Amazon
Hähnel - MODUS 600RT MK II - Pro Kit - for Nikon - Wireless connectivity - TTL, Manual & Multi Modes - Quick-lock hot shoe - Built-in 2.4GHz wireless receiver & transmitter
Clifton Cameras
Hahnel Modus 600RT MK II Pro Kit - Nikon