First things first: the device is working properly. Yet a little irritated that it is not the unit pictured is that certainly had some be chosen deliberately, because it promises a simple handling: Cable in camera, press the button, ready. It comes instead and rather unusual at Amazon a device that suspect has many buttons, a battery compartment, and a display. Because the device can do a bit more than just Focus and Shoot, read in a printed quite small chinese (?) / English instructions. And who does not want all this - There are to the operating instructions nothing that makes the battery easy way and then drives his camera without stress in the essential basic functions: arming, triggering. The device name appears without properly processed and is serving for a surprisingly low price, compatible with my EOS 450D.