Features: Switch the modes between cool and heat. Control temperature by the temperature setting value and the difference value. Refrigeration equipment output delay protection. Alarm when temperature exceeds temperature limit or when sensor error. All parameters setting can be saved when power off. Temperature calibration function. Can be used for household freezer, water tanks, refrigerator, industrial chiller, steamboat, industrial equipment and other temperature control applications. Specification: Condition: 100% brand new Temperature measurement range: - 19 ℃ ~ 99 ℃ Temperature control: - 19 ℃ ~ 99 ℃ Temperature measurement error: ±1 ℃ Sensor model: NTC 10K Accuracy: 1 ℃ Working voltage: 12V/24V/220V (Optional) Output type: relay output up to 10A Using the environment: - 10 ℃ ~ 60 ℃ Refresh frequency: 4 times/second Other functions: power off memory, state memory, temperature correction, delay start, high temperature alarm Package List: 1 x Temperature Controller 1 x User Manual 1、Switch the modes between cool and heat. 2、Control temperature by the temperature setting value and the difference value. 3、Refrigeration equipment output delay protection. 4、Alarm when temperature exceeds temperature limit or when sensor error. 5、All parameters setting can be saved when power off.