Control temperature by setting the temperature set value and the different value. Dual heating and cooling function. Automatic over temperature alarm This mini temperature controller is an excellent and convenient multifunction device for controlling temperature in farms, greenhouse, refrigeration house The stability of temperature is one of the crucial factors that contributes to the health and safety of your animal or vegetable Touch switch mode, and 0.1°C accuracy, strict control of the temperature This advanced temperature controller can measure and control temperature from -55 to 120 °C Model: STC - 3000 Type: 110-220V 30A Working principle: electronic thermostat, digital thermostat Thermostat temperature range: -55 ℃ ~ 120 ℃ /-67 ~ 248℉ color: As shown Material: plastic size: 85 x 64 x 35mm Package Contents: 2 x digital temperature controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.