Task Lighting T-MSS-D-TS Doppler Motion Sensor Switch, 12V/72 watt or 24V/144 wattThe Doppler Motion Sensor Switch is a game changer for motion detection in home lighting. FCC tested and approved, the sensor emits harmless waves that can pass through thin barriers such as a cabinet or shelf panel. When motion is detected, the lighting will be triggered with a smooth brightening to full output. Install it out of sight, facing the direction where motion detection is desired, and choose how long the lighting will remain on once