1、The temperature control range is -40℃ to 120℃ 2、With large and clear LED display for better readability 3、Compatible with refrigeration and heating control 4、With delay start function 5、Temperature upper and lower limit setting function, factory parameter locking function 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