[Simple to Use]: The temperature range for this temperature controller is -40 to 110C. Easy to set and adjust, featuring an HD LCD display and 4 control buttons. This is a relay temperature controller; an external power supply must be connected for the load. [High Current 30A Relay]: High power capacity: 220V 30A. Suitable for high-power equipment such as refrigerators, brooders, incubators, fermenters, greenhouses, and more. Connect the power supply and heating or cooling equipment, place the sensor probe, set the desired temperature, and the controller will operate efficiently. [Heating/Cooling Function]: Heating Mode 'H': When the detected temperature is less than or equal to the set temperature minus hysteresis, the relay turns on and the heating equipment starts. When the detected temperature is greater than or equal to the set temperature, the relay turns off and heating stops. Cooling Mode 'C' operates on the same principle for cooling equipment. [Delay Start & Temperature Correction Function]: Delay Start 'OPH': After a heating or cooling cycle ends, the system begins a timing period 'T'. Once T is greater than or equal to OPH, the next cycle can begin. Temperature Correction 'OFE' (-10.0 to 10.0C): Allows calibration to correct measurement deviations over long-term operation. Actual temperature = measured temperature + correction value. [High Temperature Alarm Function]: When the actual temperature reaches or exceeds the alarm threshold, the system activates an audible and visual alarm and disconnects the relay. Press any button to disable the alarm. Use Steps: 1. Connect the sensor to the controller. 2. Connect the controller to the power supply. 3. Set the start temperature, stop temperature, and temperature correction value. 4. Disconnect the power supply. 5. Connect the load to the relay output terminal with an external power supply if required. 6. Reconnect the power supply to the controller. 7. Test and begin operation. Color: As shown Material: Plastic Package Contents: 1 x XY-DT01 Digital Temperature Controller Note: The package includes only the items listed above. Other accessories are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual product. Measurement error allowance: +/- 1-3 cm.