I was for a long time looking for a remote release. I started with a wired trigger because I enjoy spending long exposures at night and you just can not progressing without trigger. With the cable but this is such a thing: the effects of camera shake at night accidentally when grabbing the remote and in addition to the tripod comes is unfortunately one or the other image unusable. So I continued to look for a remote trigger (not IR-timer !!!!) has a broad reach and also supports long exposures. I came across this device (Yonguo RF-603 / C3 - Set Radio Trigger and Flash Trigger for Canon) which is also good, but no long exposures support so I ordered the pixel. My expectations were completely taken with this unit and also exceeded. Normal timer with a range up to 80 meters Continuous shooting Long Exposure Delayed trip And freely selectable and programmable trigger And all this even with a small display on the operation for the full control of the camera. All in all the best device I've ever had. Two minuses, the device has however yet: the manual is in English only / but the device can be explained almost by itself and a pinch there's still Youtube, and the recipient has, unfortunately, no hot shoe attachment so that you could have possibly an external flash can still operate so , In spite of all of my full marks.