[Simple to Use]: The temperature range for this temperature controller is -40 to 110°C. 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 equipment such as refrigerators, brooders, incubators, fermenters, greenhouses, and more. Connect the power supply and heating or cooling devices, place the sensor probe, set the desired temperature, and the controller will operate automatically. [Heating/Cooling Function]: Heating Mode 'H': When the detected temperature is below the set temperature minus the hysteresis value, the relay activates and the heating device turns on. When the detected temperature reaches the set point, the relay turns off and heating stops. Cooling Mode 'C' operates on the same principle for cooling devices. [Delay & Temperature Correction Function]: Delay Function 'OPH': After a heating or cooling cycle ends, the system begins timing. Only when the time exceeds the OPH setting will the next cycle start, preventing rapid cycling. Temperature Correction 'OFE' (-10.0 to 10.0°C): Corrects measurement deviations that may occur over long-term operation. Actual temperature = measured temperature + correction value. [High Temperature Alarm Function]: When the actual temperature exceeds the alarm threshold, the system triggers an ble and visual alarm and automatically disconnects the relay. Press any button to reset the alarm. Use Steps: 1. Connect the sensor to the controller. 2. Connect the controller to the power supply. 3. Set the desired temperature, stop temperature, and temperature correction value. 4. Disconnect the power supply. 5. Connect the load (heating or cooling device) to the relay output terminal with an external power source 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 product image and the actual item. Measurement error allowance is +/- 1-3 cm.