For beginners who have not / do not know Yongnuo: This wireless remote shutter fully resolve problems with them flashes stored manually triggering the reflex (in this case, Nikon, with the RF610C and Canons) triggered, so that the camera on a tripod losgelöst arise. Several flashes may ignite manually on different power outputs (1/1 to full power to 1/128) are synchronously triggered (in different groups). When you add a Nikon remote controls can also be triggered, a RF605N is then set as a receiver (set with one touch) with a cable to the camera. The other RF605N serves transmitter. Nikon used two different synchronous connections for both (!) Is a cable in the package when. I know of no other company that it customer friendly. By the way: the incomparable quality and cheap high yet YN 560 III and IV all new, you do not need the receiver both have this already flashing on board as standard. But just about everyone (even / old) Flash can, if it only has a hot shoe ISO (almost everyone unless it is compatible with Sony or Minolta), integrate with these triggers in their strobe together. On the excellent lightning and triggers Yongnuo are amateurs and professionals around the world rely. Who does not think so: YouTube!