The SEC_SCS318 is a set which combines a programmable 7 day room thermostat with a wirelessly controlled relay switch used for controlling a central heating. Because of its TPI energy saving software the user can start to save up to 10% energy consumption. SCS317: The SCS317 is a battery operated room thermostat capable controlling a central heating wirelessly via Z-Wave.It has a built in clock and calendar. This allows the user to adjust different time and temperature settings from the factory default settings. Up to six different time and temperature settings are available in each 24 hour period.This programmable room thermostat has a large display and intuitive user interface, making it easy to set up and use. SSR303:The SSR303 is a wirelessly controlled Relay switch to operate loads up to 3 A / 230 V. It is used to control warm water boilers or magnet valves. The device can be operated locally using two buttons. A LED indicated the current switching status. The fashionable design of the device allows mounting it on visible positions in the home.