Horstmann Centaur SC1 is an electronic central heating control that offers precise timekeeping and flexible programming for your home's heating system. It features three ON and three OFF periods per day, allowing you to create a customized heating schedule that suits your lifestyle. With the override program options of CONSTANT, ALL DAY, AUTO, and OFF, you can easily adjust the heating to your current needs. The ADVANCE button provides instant switching between ON and OFF periods, while the BOOST button gives you a one-hour heating boost when required.