JJC TM-I2 timer remote controller is designed for Sigma DP1 Quattro DP2 Quattro DP3 Quattro cameras. This remote controller is designed to reduce camera shake to an absolute minimum. The remote has a two stage release button, half-press to focus, fully press to take a photo. Slide to the locked position for continuous shooting. It also can be programmed to function as an intervalometer allows you set self-timer, interval timer, long-exposure timer, and exposure-count setting features. The timer can be set anywhere from 1 sec. to 99 hrs., 59 min., 59 sec. The maximum number of exposure is 399 or infinite. In addition, press the LOCK button for 2s will lock the panel to prevent you carelessly stop a running timer. The humanized backlight allows you see the LCD display even in a dark condition.