Siemens RDJ100RF/SET Programmable Wireless Room Thermostat and Receiver

RDJ100RF battery powered, wireless, digital, daily programmable room thermostat and receiver. Range 20 metres line of sight between transmitter and receiver. Features large display and control dial, four operating modes - Automatic, Comfort, Energy saving and Frost protection, volt free relay contacts and advance/override facility. The digital display shows operating mode, actual room temperature and the ON/OFF times. When visible, the triangle symbol indicates a heating demand and the battery symbol indicates that the batteries need replacing.