The attractive Watt Stopper Vacancy Sensor will save you money on your electric bill. Using infrared technology, sensors automatically turn light off after a space becomes vacant and a preset time delay of thirty minutes elapses. Manual on/automatic off meets the California residential energy code. Programming mechanism is located under the switchplate. Compatible with 0-550 watt incandescent, fluorescent, compact fluorescent, MLV and ELV. Fits in place of a standard outlet switch.Specifications• 120 VAC, 60 Hz• Coverage of 180°, maximum 300 ft2 (27.9 m2)• Compatible with 0-500W incandescent, fluorescent, compact fluorescent, MLV, and ELV• Set time delay of 30 minutes• 1.0 mm hard, poly IR 2 lens; 2 level lens for superior small movement detection.• Dimensions: 2.63″ x 1.69″ x 1.88″ (67.8mm x 42.9mm x 47.8mm) L x W x D• Five year warranty; UL and CUL listed• Colors: White or Light AlmondThis model has a switch with a built-in LED night light that illuminates whenever overhead lights are off.