Control Autofocus and Shutter Triggering, Capture Images without Camera Shake Ideal for Taking Long Exposures Use for Continuous or Single Exposures No Battery Required-Powered by Camera Larger, More Comfortable Form Factor Whether you are shooting in the studio or outdoors, the Foto&Tech Wired Remote Switch for Olympus DSLRs with Connection 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.