From the Manufacturer
Stop fumbling around for a light switch in the dark or while you have something in your hands, by using the Smarthome SELECT Screw-in Motion Sensing Light Adapter you can have light bulbs turn on automatically when you enter a room and off automatically after you leave. It doesn't get any easier than this; there is no wiring or advanced installation required. Simply turn the existing light switch off, remove the light bulb it controls, screw in the adapter to the empty socket, screw the light bulb back into the adapter and turn the switch back to on. Now you can carry those dirty clothes into the laundry room, walk into the garage, enter a walk-in closet, go to the basement or climb up into the attic and never get stuck looking for a light switch. The Passive Infrared (PIR) motion sensor detects movement with a 360 Degree field of vision up to five meters. There are three adjustable dials that let you customize the settings of your adapter. This automatic switch will not only make your life more convenient, but because it turns of automatically, it conserves energy as well. Note: Maximum power for an incandescent bulb is 60W, for an energy saving bulb it is 20W.