The programmable Eberle 0537 20 141 900 Instat Plus 3 R Indoor thermostat Surface-mount 24h mode Heating / cooling 1 pc(s) with real-time clock (factory setting of date and time) enables you to set switching times (up to 6 per day) and temperatures according to your personal habits. 3 programme types, 7 days (Mon - Sun), 5/2 days (Mon - Fri/Sat - Sun) and 24 h (Mon - Sun) simplify the programming. The programmable valve protection prevents a firm seating of the valves or pumps during summer. Can be used for regulating the actuators in floor and convection heaters, oil and gas-hot water heaters, circulation pumps, heat pumps and electric heaters.