Thickened Blades: Seven thickened blades deliver more powerful and uniform air volume, not easy to deform. It runs stably and vibration-free, ensuring large air volume while reducing noise. Strong Ventilation: Upgrade fully closed pure copper motor ( to 2800r/min) offers fast fume suction, ventilation, keeping the indoor air fresh and comfortable. High Quality: The metal shell with ceramic paint is , dirt , oil , and provides excellent strength and durability. Wide Application: Easy to install, suitable for kitchen, toilet, , meeting room, restaurant, supermarket, cinema, Internet cafe, workshop, waiting hall, etc.