The ESI Electronic Digital Room Thermostat in white (ESRTD3) is a versatile and efficient device designed for controlling the temperature in any room. This thermostat is compatible with central heating radiators and underfloor heating systems, making it a convenient choice for any home. With its 3-wire wire configuration, square shape, and digital control style, this thermostat offers precision and ease of use. The ESI ESRTD3 also features a programmable dial for adjusting settings and a digital display for clear visibility. This thermostat is a reliable and essential addition to any heating system.