Decora Wall Switch passive infrared occupancy sensor is used to provide automatic lighting control for energy savings and convenience in a variety of commercial applications, including small offices, conference rooms, lounges, and classrooms. It can be used for automatic switching of incandescent lamps and fluorescent and low-voltage lighting with electronic or magnetic ballasts. The unit also features a manual override switch that can be used to keep lights OFF while an area is occupied, which may be desired in conference rooms and other areas during slide or film presentations. The unit installs in place of a single-pole wall switch and fits in a standard wall box. The unit requires a ground connection and features ambient override on. The wallplate is not included and must be purchased separately.