[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-button interface. This is a relay-based temperature controller; an external power supply must be connected for the load. [High Current 30A Relay]: Supports high power load up to 220V 30A. Suitable for high-power applications such as refrigerators, brooders, incubators, fermenters, greenhouses, and similar equipment. Connect the power supply and heating or cooling device, place the sensor probe, and set the desired temperature for reliable operation. [Heating/Cooling Function]: Heating Mode (H): When the detected temperature is less than or equal to the set temperature minus hysteresis, the relay activates and the heating device turns on. When the detected temperature reaches the set value, the relay turns off and heating stops. Cooling Mode (C) operates on the same principle for cooling devices. [Delay Start & Temperature Correction Function]: Delay Start (OPH): After a heating or cooling cycle completes, the system begins a timer (T). Once T equals the OPH value, the next cycle can begin. Temperature Correction (OFE) range: -10.0 to +10.0C. This function compensates for potential temperature deviations after prolonged operation. Actual temperature = measured temperature + correction value. [High Temperature Alarm Function]: When the actual temperature reaches the preset alarm threshold, the system triggers an audible and visual alarm and automatically disconnects the relay. Press any button to deactivate the alarm. Use Steps: 1. Connect the sensor to the controller. 2. Power the controller. 3. Set the start temperature, stop temperature, and temperature correction value. 4. Disconnect power. 5. Connect the load with a power supply to the relay output terminal if required. 6. Reconnect power 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 product image and actual item. Measurement error allowed is +/- 1-3 cm.