Screw fix the magnetic switch to door or window. When opened, the door or window will automatically turn on a light if the Bayonet Bulb Holder M09228 is being used, or electrical appliance if the Remote Control Socket M09265 is being used. The light will be switched on for a programmable interval of between 2 to 10 minutes. Ideal to create a lighted path to the bathroom or light to a room as soon as a door is opened. Our range of Remote Control Items is designed to enable users to control electrical items around their home in order to maximise independence, safety and comfort.