The Resideo Total Home wireless digital room thermostat has been designed to provide automatic temperature control of gas or oil fired boiler systems, underfloor heating, electric heating and zoning systems. The Resideo Total Home is ideal for use with Honeywell Home evohome, where temperature control of a single zone operated by a motorised zone valve or an electric appliance (such as a towel rail is required. The Resideo Total Home has an ECO button energy saving feature which gives timed setback or boosts temperatures to reduce energy demand. This is a TPI (Time Proportional Integral) control product, which make boilers operate more efficiently and provides close, accurate control. This is continually improved by a self learning adaptive capability. The 'OFF' setting can be used for frost or hypothermia protection, assuming the system time control is also switched on. 'Installer Mode' allows control to be matched to the system and user requirements, adapting minimum on or off times, set point controls etc. The volt free connections are ideal for use with combination boilers or heating zones. Resideo Total Home TTHWFD Wireless Digital RF Thermostat 1 x Digital Wireless Thermostat 1 x Wireless Relay Box 1 x Table Stand 2 x AA Batteries 1 x Instructions Manufactured by Honeywell Resideo