Louvered Ventilator 
 Panel, mask manufacturing with high-quality ABS plastic 
 Five-leaf structure, leaf than the average increase of six wind 
 Precision balanced motor and high-performance materials, so that ventilation fans, low noise, low energy consumption, long life 
 Quality motor manufacturing technology, the motor of high quality oil bearing and automatic over-temperature protection materials, quiet operation, quality long-lasting, longer life