[Simple to Use]: The temperature range for this temperature controller is -40 to 110C. Easy to set and adjust, featuring an HD LCD display and 4 control buttons. 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 of up to 220V 30A. Suitable for use with high-power equipment such as refrigerators, brooders, incubators, fermenters, greenhouses, and more. 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 or exceeds the set temperature, the relay disconnects and the heating device turns off. Cooling Mode 'C' operates on the same principle for cooling applications. [Delay Start & Temperature Correction Function]: Delay Start 'OPH': After a heating or cooling cycle ends, the system begins timing period 'T'. Once T is greater than or equal to OPH setting, the next cycle can begin. Temperature Correction 'OFE' (-10.0 to 10.0): Allows adjustment to correct potential temperature deviations after prolonged use. Actual temperature = measured temperature + correction value. [High Temperature Alarm Function]: When the actual temperature reaches or exceeds the alarm threshold, the system triggers a sound and light alarm and automatically disconnects the relay. Press any button to disable the alarm signal. Use Steps: 1. Connect the sensor to the controller. 2. Power the controller. 3. Set start temperature, stop temperature, and temperature correction as needed. 4. Disconnect power. 5. Connect the load with power supply at 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. Slight color variations may occur due to lighting and screen display differences. Measurement error allowance: +/- 1-3 cm.