[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 is required for the load connection. [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 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 less than or equal to the set temperature minus the hysteresis value, the relay activates and the heating device turns on. When the detected temperature reaches the set temperature, 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 allows compensation for measurement deviations over long-term operation. Actual temperature = measured temperature + correction value. [High Temperature Alarm Function]: When the actual temperature reaches the alarm threshold, the system activates an audible and visual alarm and disconnects the relay. Press any button to silence 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 power supply to the relay output terminal if needed. 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: Other items not included. Lighting and display differences may cause slight color variations between the image and the actual product. Measurement error allowed: +/- 1-3 cm.