The practical upgrade to the traditional timer plug. This light switch timer is an easy and reliable way to turn your existing light switch into a programmable security lighting timer light switch. It can be fitted to the 1, 2 or 3 gang light switch on your wall without the need to make any changes to your switches or perform any wiring. This easy-to-install device is perfect for making your home look occupied when you're out late, away on holiday or don't want to come home to a dark house. The battery-operated timer switch allows you to have your house lights come on and off at different times on different days (up to 9 programmes per day) to make it appear like your home is occupied.