Whether you are shooting in the studio or outdoors, the Foto&Tech Wired Remote Switch for Pentax provides you with a simple way to control exposures and an easy-to use-tool to create more "keepers" The unit provides functionality such as: autofocusing, continuous shooting or single image capture and long time exposures. Since you can trigger exposures without touching the camera you will capture clear, blur-free images. The unit requires no batteries - it draws its power from the camera. The Wired Remote Switch is a huge asset to keep in your studio or gear bag. This particular wired switch uses a cable that's 97 cm long, and is compatible with PENTAX 645Z, 645D, K3, K5, K5 II, K30, K50, K500, K7, K110D, K100D, K100D Super, K200D, K10D, K20D. Press the button half-way in to autofocus. Depress the button fully to trigger the shutter. Press the button and slide it forward to lock for long exposures. Larger, more comfortable form factor. Specifications: Total length: 97cm, Product Weight: 2 ounces.