NEEWER Timer Remote for RS-80N3 CANON EOS 7D, 50D, 40D, 30D, 5D, 20D, 10D, 5D Mark II, 5D Mark III, 1DMark IV, 1Ds Mark III, 1D Mark III, 1D Mark II N, 1Ds Mark II, 1D Mark II, 1Ds, 1D, 1V, EOS 3, D2000 The timer can be set anywhere from 1 second to 99 hours, 59 minutes, 59 seconds. Functions as a timer remote and can be programmed to function as an interval met The buttons can be operated with a single thumb. The LCD panel can also be illuminated. The remote has a stylish and ergonomic design, making it a pleasure to use. The shutter release button on the remote is a two-stage button: half-pressing the button will cause the camera to focus, and full-pressing will trigger the camera's shutter. Battery life: Approximately two months of continuous shooting with a delay of 5 min, an exposure time of 4 min 56 s, and an interval of 5 min.