The T1-SS204 is a bi-level passive infrared (PIR) occupancy bi-level sensor that mounts in indoor light fixtures to provide daylight harvesting control. It works by 10-28V DC power, and controls 0-10VDC LED drivers or dimming ballasts. All control parameters, including hold-time, task light level, and stand-by level and time, are adjustable via DIP switch. Task light level also works by remote control. Works great with Flat Panels and Center Baskets.