Go green with Radio Powr Savr! Let Lutron turn the lights off for you. It’s a simple and easy way to save energy and add automation to your home. They combine both convenience and exceptional energy savings along with ease of installation. Lutron’s ceiling-mounted vacancy sensors are wireless, battery-powered passive infrared (PIR) sensors that automatically control lights via RF communication to compatible dimming and switching devices. The sensors wirelessly transmit the appropriate commands to the associated dimming and switching devices to turn the lights off automatically when room is not occupied