1、MAINTAIN TEMPERATURE BALANCE: The working temperature range of the probe is about 45‑50℃. Above this temperature, the fan will automatically stop after the temperature drops to maintain temperature balance, reduce noise, and extend the life of the fan 2、FAN CURRENT CONSUMPTION LESS THAN 500MA: Recommended to choose a fan with a current consumption of less than 500mA to reduce the heat generated by the control board 3、BEST POWER UTILIZATION: The input voltage should be as close as possible to the nominal voltage of the fan to get the best power utilization. If low voltage drive must be used, sufficient current supply must be ensured 4、ADJUSTABLE IN 4 LEVELS: The fan speed is adjustable in 4 levels, which can take into account users' preferences for noise and efficiency 5、GOOD QUALITY PCB MATERIALS: Good quality PCB materials have reliability and miniaturization, good maintenance and interchangeability