This product is proudly brought to you by PHOTOGEAR.Function:TC-252 function is single, continuous, bulb, delay shooting modes; and also timer planning shooting mode.Delay shooting can be set the time and number of shoot; delay time is 1s to 59s; number of shoot is 1 to 99 pictures.Timer planning mode can be set the time between 0S to 99H59M59S. Different output cable can be connect with different brand camera.It can be used as normal shutter release when this product without battery.TC-252 is using LCD display to showing function, its easy to understand and operate.The product surface is using high-end stain finish.The plating is inlaid around the button.Specification:Type: Timer Remote ControlCable length: 1.8M (Coiled style)Transmitter Stand-by Time: 3 Years (2X AAA alkaline battery)Measurement (L X W X H): 149 X 49.5 X 24 MM Weight (with battery): 70.5gPackage includes:1x TC-2521x Shutter connecting cable2x AAA battery1x Instruction manualCompatible with:Canon: EOS 50D/40D/30D/20D/10D/7D/6D/5D series/ 1D series