[Simple to Use]: The temperature range for this temperature controller is -40 to 110C. Easy to set and adjust with an HD LCD display and 4 buttons. This is a relay temperature controller; an external power supply is required 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 probe, and set the desired temperature for reliable performance. [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 reaches the set temperature, the relay disconnects and the heating equipment stops. Cooling Mode 'C' operates on the same principle. [Delay Start & Temperature Correction Function]: Delay Start 'OPH': After a heating or cooling cycle ends, the system begins timing 'T'. When T equals OPH, the next heating or cooling cycle can begin. Temperature Correction 'OFE' (-10.0 to 10.0): Corrects for potential deviations after prolonged operation. Actual temperature = measured temperature + calibration value. [High Temperature Alarm Function]: When the actual temperature reaches the alarm temperature, the system activates a sound and light alarm and disconnects the relay. Press any button to silence the alarm. Use Steps: 1. Connect sensor to controller. 2. Connect power supply to controller. 3. Adjust start temperature, stop temperature, and temperature correction. 4. Disconnect power supply. 5. Connect load with power supply at relay output terminal if needed. 6. Reconnect power supply to controller. 7. Test and begin operation! Color: As shown Material: Plastic Package Contents: 1 x XY-DT01 Digital Temperature Controller Only the above package content is included; other items are not included. Note: Lighting and different displays may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.