Quickly absorb moisture and odor,improve indoor air quality,low noise,sufficient power,and wide range of uses The exhaust fan adopts an interlocking design and a curtain-style double pull cord,which can prevent wind and foreign objects from entering when closed,and is easy to operate The ventilation fan adopts ABS one-piece panel,which is resistant to high temperature,not easy to deform,and has a long service life. The motor adopts oil-containing bearings for stable operation. Specifications: 6-inch,17W,186m3/h,42dB; 8-inch,24W,264m3/h,48dB This ventilation fan adopts a forward rotating check valve,which is not affected by high-rise wind pressure and has low operating noise