The Square D X Series 3A 500W Single-Pole Occupancy/Humidity Sensor Light & Fan Control Back Wires is an occupancy sensor, light switch, and fan control in a single, easy-to-clean matte finish. Automate lights to ON/OFF based on occupancy and available natural light to make saving energy easy. Enable manual control of the fan or lights at any time via two independent push buttons. Adjust timing for fans and lights in increments of 10, 20, or 30 minutes. Set relative humidity levels between 30-85%. Complete the look with one of the Square D X Series cover plates (not provided) that easily snaps into place for a modern, flush-facing finish to your walls. Enjoy a consistent look in your room or home with the full line of Square D X Series switches, dimmers, sensors, and receptacles. It features protective painted surface treatment. It offers 180 field-of-view from Passive Infrared Sensor that detects movement up to 800 square feet and set relative humidity levels between 45 and 80%. It benefits from a combination of fan switch, humidity sensor and occupancy sensor, constituting a time and space saving for your interior. This sensor has a width of 43 mm and a height of 103 mm. By being mercury free and heavy metal free, this sensor switch is cUlus certified.