Features: HEATCOOL MODES: control temperature by setting the temperature setting value and the difference value. MULTI-PROTECTION: the function of temperature calibration checks and adjusts the accuracy by comparison with the standard value; automatic protection delay cooling system; and automatic overtemperature alarm. PRECISION CONTROL: scientific layout, best performance; anti-breakdown capacitor ensures safe protection electric circuit. WIDE APPLICATIONS: this temperature regulator can be used for refrigerator, coffee maker, aquarium, water tank, kiln, furnace, greenhouse, incubator, etc.. DUAL DISPLAY: clear and accurate readings, no illegible character.