Features: * brand new and high quality *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 Specifications: *Temperature Range: -55-120 degree Celsius *Control Temperature Accuracy: 0.1 degree Celsius *Display Color: Red and Blue *Optional Power Supply Voltage: 12V / 24V / 110V-220V *Data Save: Yes *Relay: 20A *Dimensions: 79 * 43 * 26 mm (Approx.) *Hole Size: 74 * 39 mm (Approx.) Package Contents: 1 * Temperature Controller Note: The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 【Dual Mode】This temperature controller allows you to select between cooling and heating working modes, providing versatile temperature control options. 【Precise Temperature Control】With a control temperature accuracy of 1 degree Celsius, you can easily set the desired upper and lower limits to avoid accidents and maintain a constant temperature. 【Temperature Calibration】You have the flexibility to calibrate the temperature according to your specific requirements, ensuring accurate and reliable temperature readings. 【Wide Temperature Range】This thermostat meter supports a temperature range of -55 to 120 degree Celsius, allowing you to monitor and control temperatures effectively in various environments. 【Easy Installation】With compact dimensions of 79 * 43 * 26 mm, the temperature controller can be conveniently installed using a 74 * 39 mm hole size. Simply connect it to the power supply and start regulating temperatures effortlessly.