The JJC S series Remote Switch is a Compact wired remote switch with 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-up pictures. * Simple and Easy to Use. Control auto focus 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.