This product is compatible with Canon EOS 60D, 1000D, 550D, 500D, 450D, 400D, 350D, 300D, PowerShot G10, G11, EOS 30, 33, 50, 300, Pentax: K7, K10, K20, K100, K200, Samsung: GX-1L, GX-1S, GX-10, GX-20, Contax: 645, N1, NX, N Digital. The Kaavie CR-12 Series Remote Switch is a compact wired remote switch with a cable which replicates all functions of the camera's shutter release button. Handy for taking pictures of subjects that are difficult to approach, or to minimize vibration for close-ups. How to use: Press the button half-way to autofocus. Depress the button fully to trigger the shutter. Press the button and slide it forward to lock for longer exposures.