KIWIFOTOS UR-232 Tasman Camera Remote Switch has multiple models to be compatible with CANON, NIKON, OLYMPUS, SONY, PANASONIC, PENTAX, SIGMA, MINOLTA, SAMSUNG, FUJIFILM etc. cameras. You can easily use this remote switch on different cameras by changing the connecting cables. This remote switch is designed to reduce camera shake to an absolute minimum. It is a perfect choice for taking long exposure photos. The remote has a two-stage release button, half-press to focus, fully press to trigger the shutter and take a photo. For long exposure, please press the release button fully and slide it into the locked position. The shutter will stay open as long as the shutter release button is locked. To unlock the shutter, just slide the release button back to its original position. This remote is powered by camera, you don’t need to install a battery.