The Square D X Series 10A Ceiling Mount PIR Occupancy Sensor allows for automatic recognition and precise detection of the environment. The rated operational voltage of this sensor is 120V. This sensor is surface mounted and provides 360 detection up to 1,200 square feet, making it suitable for larger, open spaces. However, an independent light sensor will not turn on lights if ambient light in room is sufficient. However, an independent light sensor will not turn on lights if ambient light in room is sufficient. When movement is not detected, and the sensor times out, any movement within the next 30 seconds will turn the lights back ON. It offers 360 field-of-view from Passive Infrared Sensor. This sensor has a width of 115 mm and a height of 115 mm. By satisfying the ICES-003 and UL 1917 standards, this sensor is cUlus certified. Its Ue rated operational voltage is 120VAC. Its Ie rated operational current is 10A. The dimensions are (W) 115mm x (H) 115mm. This device is compliant with cULus certification. Its mercury free and heavy metal free.