I bought this radio trigger for my 20D and am very satisfied. It also triggers from about 50 meters out still good, even more distance I have not yet tested. The processing affects quality and there are also batteries included. The receiver can be mounted on the flash shoe, but has not, so that you can plan make a flash and at the same time can still use the remote trigger. The only shortcoming: the battery compartment of the transmitter goes on only with difficulty, but because you have to change the batteries often, I can live well.