Ceiling Mount PIR Sensor Motion Activated Switch (Corridor) ENSA-PS2 The ENSA-PS2 is an intelligent sensor switch, designed for indoors ceiling mounting. It features configurable ambient light sensing, passive infrared motion detection and on-time delay, so you may tailor light usage and energy consumption to your exact specifications. Add three step energy saving to any light with sensor switches: 1) Daylight sensor: Activates motion sensor when lux levels fall below limit 2) Motion sensor: Detects movement, turns light on only when necessary 3) On-timer: Light-on duration is set only as long as is required Features: Automatically activate and deactivate lighting for energy efficiency Adjustable sensors: Daylight (3~2000lx) / Motion (4x20m square) / On-timer (10s~30min) 360° rectangle / 4m x 20m passive infrared detection Ceiling mount, for indoor use only .