Easily control your indoor lamps using the power of light with the Utilitech Wireless Dusk-to-Dawn Security Light Sensing Plug. This plug and sensor set lets you easily control your lights using light, so they turn on at dusk and off at dawn! Simply plug in whichever lamp you want to control, position the sensor, and set it to turn off after 2, 5, or 8 hours or at dawn. The plug and sensor feature a 100 ft. range, meaning you can easily position and control just about any light. Plus, the sensor is battery-powered giving you the wireless freedom to place the sensor wherever it works best for you.