I am going to purchase my first Speedlights since the Dark Ages (film). It seems that after reading and research that the TT685 and the X1T will suit my needs for features, power and price. My question is: When using two of these units off camera, is the X1T all I need, or will I also need a receiver of some kind? I think the units will talk to each other, and all I need is the transmitter on the camera and the correct settings dialed in, with no additional hardware to fire the flashes.
Or am I missing something?