Yongnuo YN-622N Wireless i-TTL for Nikon D70/D70S/D80/D90 D200/D300/D300S/D600/D700/D800 D3000 LF237 This Item Includes: Transmitter - Receiver Supports i-TTL Pass-through function when on camera Max sync speed is 1/8000th second, some cameras may only support up to 1/4000th second and cameras & flashes that don't support HSS the sync speed may as low as 1/250th second or even lower, please check your flashgun and camera manual Full TTL so that you can set up your flashguns remotely Supports mixed trigger mode which means you can have one flash set to work in TTL mode and another in manual mode etc