Specifications: Can select cooling or heating working mode. Set highest/ lowest upper limit temp to avoid accident. Automatically start cooling or heating for constant temperature. Temperature calibration, you can calibrate temp according to requirement. High temp alarm, when measure temp reach to the setting temp, controller will alarm. Type: Temperature Controller Material: Electronic Components Temperature Range: -55-120 ℃ Control Temperature Accuracy: 0.1 ℃ Refresh Rate: 0.5s Display Color: Red and Blue Power Supply Voltage: DC 12V Measure Input: NTC 10K 0.5% Waterproof Sensor Output: 1 Channel Relay 20A Data Save: Yes Relay: 20A Environment: -10~60℃ Humidity: 20%-85% Features: with LCD Display, Cooling/ Heating Modes, Automatically, Durable Size: 7.9cm x 4.3cm x 2.6cm/3.11" x 1.69" x 1.02" (Approx.) Notes: Due to the light and screen setting difference, the item’s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Temperature Controller Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store