The nWSX/nWSX PDT Series nLight wall switch occupancy sensor provides a simple control solution for a small room. Capable of detecting small motion up to 20 ft (6.10 m), this sensor is perfect for private offices, private restrooms, copy rooms, closets, or any small enclosed space. The nWSX uses Passive Infrared (PIR) detection while the nWSX PDT utilizes PIR/Microphonics Dual Technology (PDT). These stylish, low-profile sensors can be programmed locally (via the front push-buttons) or remotely (via the nLight SensorView software). The nWSX/nWSX PDT also includes an integrated photocell (disabled by default).