[Simple to Use]: The temperature range for this temperature controller is -40°C to 110°C. Easy to set and adjust, with HD LCD display and 4 buttons. This is a relay-type temperature controller; an external power supply is required for the load. [High Current 30A Relay]: Rated for 220V AC, 30A. Suitable for high-power equipment such as refrigerators, brooders, incubators, fermenters, and greenhouses. Connect the power supply and heating/cooling device, place the sensor probe, and set the desired temperature — it operates reliably. [Heating/Cooling Function]: Heating Mode ('H'): When the detected temperature is less than or equal to (set temperature – hysteresis), the relay activates to power the heating device. When the detected temperature reaches or exceeds the set temperature, the relay deactivates and the heating device stops. Cooling Mode ('C') operates on the same principle, but in reverse. [Delay Start & Temperature Correction Function]: Delay Start ('OPH'): After a heating or cooling cycle completes, the system begins a delay timer 'T'. Once 'T' reaches or exceeds the OPH value, the next heating or cooling cycle starts. Temperature Correction ('OFE', adjustable from -10.0°C to +10.0°C): Compensates for long-term measurement drift. Actual temperature = measured temperature + correction value. [High-Temperature Alarm Function]: If the actual temperature reaches or exceeds the alarm threshold, the system triggers audible and visual alarms and cuts off relay output. Press any button to silence the alarm. Usage Steps: 1. Connect the temperature sensor to the controller. 2. Connect the controller to its power supply. 3. Set the target temperature, hysteresis, and temperature correction value. 4. Disconnect power. 5. Connect the load (heating/cooling device) to the relay output terminals. 6. Reconnect power to the controller. 7. Test operation. Color: As shown in image Material: Plastic Package Contents: 1 x XY-DT01 Digital Temperature Controller Note: Other accessories or devices shown are not included. Note: Due to lighting and screen variations, the product color may differ slightly from the image. Measurement tolerance: ±1–3 cm.