1-Transmitter:
 
Flash Trigger DRM-003 combined with multiple features like : wirelessly triggering studio flashes and flashguns, wired and wirelessly remote control, waking up flashguns, TTL-pass through. Flash Trigger DRM-003 utilizes the global free standard radio frequency 2.4GHz, stable and reliable. Meanwhile, it’s perfectly compatible with other flash triggers.
 
3-Receiver:
Digiteck TTL Pass Through Flash Trigger reciver All Nikon Cameras 
Radio Remote Flash Trigger for Nikon .It uses a wireless frequency which is suitable for free channels in many countries. With 16 independent channels, many photographers can work together using trigmaster, operating efficiently at high speeds and long distance in a stable manner. When using a Nikon camera to control the speedlight, the flash sync speed works up to 1/300s, and 120 meters remote distance (in open areas). It can work as studio flash trigger, as speedlight trigger. 
 Features:
Controlling Studio Strobe Flash with trigger
Controlling Speedlight Flash with Trigger
you can use your TTL flash on camera and still use the TTL feature 
This set contacin 1X trigger and 3X reciver