Package contents: 2 W1209 digital temperature controller board, Features: the temperature controller board has full machine patch, wave soldering, stable performance and beautiful consistency; The built-in CPU chip, namely MCU, is more intelligent and consumes less power. NTC probe: The NTC probe is waterproof and can control the temperature, allowing heating or cooling to be controlled. Electronic digital thermostat: with 3-digit LED display, extremely bright. Operation in both heating and cooling to easily control equipment and appliances.Tips: long press set to get menu, start at P0, press + or - to get next P parameter, press set to choose this parameter, press + or - to select the desired value for this parameter, press set to accept it , long press + or - = reset to default, power off is reset to default, default temperature is 34.5 degrees Celsius.Size48.5*40.1*15.8MMNote: The data is all manual measurement, please allow 1 - 79cm error, due to the difference in light and display , there will be some color difference, depending on the physical object received.