The 555020011 is a 24 hour 2 programme 4 pin Time Switch that performs the same sequence of switching operations every day, which can be changed easily using manual levers on the dial. You can disable the switching cycle for any number of days, thanks to a ‘Day Omit’ function. The Q555-2 can be used for heating, ventilation and equipment control. It has a battery reserve of 100 hours. The 24 hour programming time switch cycle performs the same sequence of switching operations on each day and can be quickly and easily set using the small manual levers on the dial. A “day omit” device allows you to select any number of days in the week on which the switching cycle can be disabled. A general purpose timeswitch for heating, ventilation and equipment control applications.