The product is a two-stage temperature controller that can simultaneously and cool using two different sides of a standard electrical relay. In the heating mode, when the temperature is lower than the set temperature, the controller is turned on and turned off when it is higher than the set temperature. In the cooling mode, the temperature is turned on when the temperature is higher than the set temperature, and is turned off when the temperature is lower than the set temperature. The product can switch between Celsius and Fahrenheit. Features - Color: Black and orange. - Material: Plastic. - Size: 8.50 x 7.50 x 3.50cm/ 3.34 x 2.95 x 1.38 inch. - Temperature control: - 50 degree centigrade ~ 110 degree centigrade. - Power supply voltage: AC220V, AC110V. - Switch the modes cool and , control temperature by setting the temperature set value and the different value. - Temperature calibration, refrigeration control output delay protection,alarm when temperature exceeds temperature limit or when error. - performance, with better support and better service. Waterproof and not rust. - With the temperature compensation function, which effectively avoids the influence of the ambient temperature on the , making the temperature measurement is more precision. - Applied to the measurement of boilers, air, liquids, water temperature in the fish pond, water temperature of the baby bath, Industrial temperature measurement. Package list: 1 x refrigerator thermostat