Occupancy sensor with ultrasonic and passive infrared technology, integrated timer and light level sensor. The device switches lights on upon movement detection for a defined time period depending on the ambient light level. Suitable for indoor use in business and office settings. Detection range of 4m radius using PIR, detection range of 10m x 16m using ultrasound. Timer range is 5s to 30min. 752 series. Operating voltage 240V a.c. 50Hz. Note: Requires installation by an appropriately licenced electrician.