Wireless remote controls suitable for the Canon EOS 300D and 350D are the RC1 and the RC5.

These remote controls can be used to fire the cameras shutter remotely without a wire. As it uses infra-red, the remote needs to be in front of the camera and has a limited range. The effective ranges are 5m.

RC5

This remote has a 2-seconds timer.

RC1

A compact device which clips to a camera strap.