[Simple to Use]: The temperature range for this temperature controller is -40 to 110℃. 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 less than or equal to the set temperature minus hysteresis, the relay activates and the heating device starts. When the detected temperature is greater than or equal to 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 ends, the system begins a timing period 'T'. Once T is greater than or equal to OPH, the next cycle can begin. Temperature Correction 'OFE' (-10.0 to 10.0℃): Allows calibration to correct temperature deviations over long-term operation. Actual temperature = measured temperature + correction value. [High Temperature Alarm Function]: When the actual temperature reaches or exceeds the alarm threshold, the system triggers an ble and visual alarm and disconnects the relay. Press any button to silence the alarm. Usage Steps: 1. Connect the sensor to the controller. 2. Power on the controller. 3. Set start temperature, stop temperature, and temperature correction value. 4. Turn off power. 5. Connect the load to the relay output terminal with an external power supply if required. 6. Power on the controller again. 7. Test and begin operation. Color: As shown