Features: Stable performance. Low noise, easy installation. Widely used for home, bathroom and more. High speed ventilation exhaust booster, 3 speed adjustable. The Exhaust Fan main body is humanized design, which is easy to install and more convenient for later cleaning and maintenance. Specifications: Material: Plastic Voltage: 5V Power: 4W Air Volume: 80m/H Noise: 22db Speed: 6000r/min Size: Approx. 122x122x55mm/4.80x4.80x2.17in Dia: Approx. 75mm/2.95in Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set Duct Fan