Efficient Exhaust Fan: 100mm, voltage 220V, speed can be 2800rpm. The specially designed airflow funnel with outlet spout reduces air turbulence in the exhaust fan and increases the operating pressure when ventilating. Enjoy silence with an air transport capacity of up to 140m3/h. High Quality: The exhaust fan is made of high quality metal, not easy to deform, has excellent workmanship, durable frame and long service life. Balanced metal wings are ideal for strengthening air supply and discharging exhaust air. Humanized design: The tail of the exhaust fan has an automatic valve that can be automatically opened and closed with the fan to prevent mosquitoes from entering when not in use. The durable hollow design at the back can achieve efficient heat dissipation, does not cause internal supercore electromechanical load. Easy to assemble: Our fan can be controlled with a rotation regulator, effective ventilation to quickly eliminate moisture and odor, it is easy to disassemble and