The ESI ESRTM Mechanical Room Thermostat is a white, wall-mounted thermostat designed for central heating systems. With a square shape and a dial control style, this thermostat is powered by a corded electric source and operates on a temperature sensor technology. The voltage required for this thermostat is 230V, and it does not have any smart home compatibility or programmability. This product is suitable for use with boilers and is ideal for controlling the temperature in a non-programmable manner in a UK housing setting.
eBay