Control temperature by setting the temperature set value and the different value. This mini temperature controller is an excellent and convenient multifunction device for controlling temperature in farms,greenhouse, refrigeration house . Press switch mode, and 0.1 Celsius accuracy, strict control of the temperature. The stability of temperature is one of the crucial factors that contributes to the health and safety of your animal/vegetables, by utilizing the temperature controller, you can provide an environment with optimal temperature. This advanced temperature controller can measure and control temperature from -55 to 120 Celsius. Automatic over temperature alarm. Dual heating and cooling function. Specifications: Model: STC - 3000 Working principle: electronic thermostat, digital thermostat Power: 30A/AC220V Thermostat temperature range: -55 Celsius ~ 120 Celsius Colour:Black Material:ABS Size:85x64x35mm Package Contents: 5 x Temperature Controller 5 x Sensor 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.