The Salus RT510RF is a programmable room thermostat that enables you to control the room temperature. This can be set for time and room temperature.nFeatures include LCD display, various operating modes, automatic timed schedules, holiday or frost protection as well as heating boost mode and RF Test function. This is an easy to install and easy to use thermostat with a 30 metre range.nUse only AA 1.5 V Alkaline batteries in the thermostat. Do not use rechargeable batteries.