Not really recommended, quite weak ...

Range is really minimal and only when standing frontally to the camera, the sides or rear, they do not work. So you want to do a family photo and presents himself and must keep the remote control directly at the camera ... but that goes ...

Against RM-4D what I have bought myself also works fine, twice the range and even 2 seconds Release for Canon ... and only 2 euros more than this "useless" thing ... so you look times RM-4D 600D gehts prima ...

PS: Oh yes, I use it mostly to make Long Exposure stand at the side or behind the Cam since this mini-timer is too weak. Do not get me wrong, it it works ... just stop excessive ...