Feature * new and high quality *This simple mechanical room thermostat from is an economical and easy to use room thermostat. *Simply turn the mechanical rotary knob to your desired temperature to control your room temperature. *This device also generates an audible "click" when you turn the knob above the current temperature so you know when the system will turn on or off. *This mechanical 2-wire thermostat is very easy to install and with potential-free contacts suitable for systems with combination or normal boiler. *Designed to allow easy automatic ON/OFF control for your heating systems by detecting the air temperature and turning the heater on when the air temperature falls below the thermostat setting, and turning off when the temperature is reached. Details *Material:ABS *Color:white *Power supply: 220V AC, 50-60Hz *Temperature adjustment range: 10 C to 30 C *Current Review: 10 Amp *Terminal difference: approx. 4C *Operating temperature range: -25 C to 55 C *Dimensions: L83 x H83 x T31mm Package Contents: 1PC Thermostat Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.*