PBWIGS 20W Exhaust Fan 4 Inch Small Powerful Kitchen Extractor Fan With Backflow Flap Wall Mounted Smoke Vent Silent For Home Bathroom Garage Offices Attic Laundry Toilets (Size : Black)

【High-efficiency ventilation】：High-volume exhaust fan diameter 100mm/4 inches, air volume 200m³/h, power 20W, speed 2800r/min, can optimize ventilation quickly and effectively. 【Anti-backflow check valve】: Bathroom Extractor Fan automatic opening and closing design to prevent fumes from backing up and prevent flying insects from crawling in, and closing when not in use to isolate crawling insects from entering. 【Safe and durable】: Powerful exhaust fan casing and impeller surface with advanced technology spraying treatment, soft color, long-lasting; high-quality all-copper motor, pure copper wire movement, more durable and long service life. 【Low noise】: Exhaust Smoke Fan the air blades are optimized to improve efficiency and reduce noise; this will not have any harm to your health and will not disturb your work. 【Easy to install】: Exhaust Fan Through Wall can be installed on the wall or ceiling, screwed in place, easy to install and remove for cleaning, this wall-mounted ventilation fan can be widely used in kitchens, living rooms, bathrooms, restaurants,