--This Choice basic mechanical room thermostat is an economical and simple room thermostat to use.--Simply turn the mechanical control dial to the desired temperature to regulate your room temperature.--This unit also provides an audible click as you turn the dial past the current temperature so you know when the system is turning ON or OFF.--This mechanical 2-wire thermostat is very easy to install and has volt-free contacts, making it suitable for systems with either a combi boiler or a regular boiler. If you have a three-wire installation, simply cut back and secure the neutral, and this two-wire thermostat will give you many years of faithful service.--Designed to provide simple automatic ON/OFF control for your heating systems by sensing the air temperature and turning on the heat when the air temperature falls below the thermostat setting and turning off when the temperature is reached.Feature:Double diaphragm temperature sensing elementSuitable for surface or flush mounting10 to 30C Setpoint range10 Amp current rating2-wire installationPower supply: 220V Ac, 50-60HzTemperature setting range: 10C to 30CCurrent rating: 10(3) AmpTerminal differential: Approximately 4COperating temperature range: -25C to 55CDimensions: L83 x H83 x D31mmPackage includes:1 pc Thermostat_tfrf