[Simple to Use]: The temperature range for this temperature controller is -40 to 110°C. 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 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 turns off and the heater stops. 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 waits for the defined OPH time delay before starting the next cycle. Temperature Correction 'OFE' (-10.0 to 10.0°C): Allows calibration to correct measurement deviations over long-term use. Actual temperature = measured temperature + correction value. [High Temperature Alarm Function]: When the actual temperature reaches or exceeds the preset alarm threshold, the system triggers an ble and visual alarm and automatically 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 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: Other items not included. Note: Lighting and screen differences may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3 cm.