Compatible with Nikon D1 D1H D1X D2HS D2X D2XS D3X D3S D4S D300 D300 D500, etc. or Compatible with Canon 5D2 5D3 S 6D 7D 7D2 50D 1Ds SLR camera, etc. Half-press to focus, fully press to trigger the shutter and take a photo, push up to lock the exposure time. Fit for macro photography, super telephoto shots and bulb exposures. Prevents camera shake and useful for taking long exposure photos. Please kindly shut down the camera before plug into the remote switch. Length Approx. 97cm Colour Black Material Plastic Model MC-30/RS-80n3 Type Remote Controls Brand Unbranded/Generic MPN TJ4894670965891 .