The Honeywell® ST9100C 7 Day 1-Channel Timer Central Heating Programmer Control is a white, rectangular-shaped programmable thermostat designed for central heating radiators. It offers 7-day programming with 3 cool stages and a timer feature, making it easy to control your heating system efficiently. This wall-mounted thermostat operates on 230V low voltage power and uses temperature sensor technology for accurate readings. With a control style that includes dial, switch, push button, and digital options, this Honeywell model is a reliable choice for managing your home heating preferences.