Descriptions: This mini temperature controller, with heat and cool control, can set both a high and a low temperature limit, when the temperature is beyond the compass of limits, it will cool or heat automatically. Features: The temperature control range is -40 to 120. With large and clear LED display for better readability. Compatible with refrigeration and heating control. Return difference is adjustable (1-30). With delay start function. Temperature upper and lower limit setting function, factory parameter locking function. Support to restore factory settings. Support power-down storage (sudden power-off settings are still valid). Supports temperature correction. Specifications: Product model: MH1230A Working voltage: AC220V Working current: relay can withstand 30A current Temperature control: -40 to 120 Measurement error: 0.5 Display accuracy: 0.1, control accuracy : 1 Temperature sensor: NTC (10K/3435) Working temperature: 0 to 60 Storage temperature: - 10 to 60 Humidity: 90% RH without moisture condensation Data storage: yes Relay contact current: AC: 30A/220V, can withstand 6600W load Temperature controller size: 8.5 x 7.5 x 3.5cm/3.35 x 2.95 x 1.38inch Sensor: probe: 4 x 25mm/0.16 x 0.98inch, cable: 1m/39.37inch Weight: 224g Package Included: 1 x Digital Temperature Controller 1 x Sensor