This Choice basic mechanical room thermostat is an economical and simple-to-use solution for controlling room temperature. Turn the mechanical control dial to your desired setting to regulate the heat. An audible click indicates when the system turns ON or OFF, providing clear feedback during adjustment. This 2-wire mechanical thermostat is easy to install and features volt-free contacts, making it compatible with systems using a combination boiler or standard boiler. For 3-wire installations, simply cut back and insulate the neutral wire; this 2-wire thermostat will deliver reliable performance over many years. Designed for straightforward automatic ON/OFF control of heating systems, it senses air temperature and activates the heating when temperatures drop below the set point, turning off once the desired temperature is reached. Features: - Dual diaphragm temperature sensing element - Suitable for surface or pattress box mounting - Set point range: 10°C to 30°C - Current rating: 10(3) Amps - 2-wire installation - Power supply: 220V AC, 50–60Hz - Temperature setting range: 10°C to 30°C - Terminal differential: Approx. 4°C - Operating temperature range: -25°C to 55°C - Dimensions: 83mm (L) x 83mm (H) x 31mm (D) Package Includes: 1 x Thermostat