Programmable on/off switching of mains powered units such as lamps, fish tank lights & Christmas lights... Even small heaters & appliances or computers etc. SAVE ENERGY: Come home to lights on, great for home security whilst away or out, ideal for hallway lighting when dark etc. Control the hours of you Christmas lights to save electric. Can be set to time on or off in 15 minute segments. Manual override button for continuous product use if required (saves unplugging & re-setting time). Works with UK 240 Volt power supplies (UK plugs fitted as standard). Manufactured to BS1363, Not recommended for use with Immersion heaters. Maximum wattage 3200W Safe: Approved to BS5733.