Automatic valve: It can automatically and close with the fan, which can effectively prevent the return air.Three-layer paint spray-Easy to clean: Reinforce the body against pressure and shock, increasing the life of the case.Blinds design: Efficient ventilation, multi-grid auxiliary air duct addition collector, make the wind change more quiet, concentrate on air acceleration convection, realize intelligent health and environmental protection.ABS imports thickened 6 blades: Using Teflon spray technology, no oil, more wind, more stable wind speed.Pure copper bearing motor: Smaller sound,Longer life.Peace of mind.Overheating protection,Leakage Protection,Hydroelectric separation.Nearly confined spaceRelevant research shows that cooking one hour of inhaling waste is equal to smoking half a pack of cigarettes. It has been plagued by kitchen fumes for a long time, and the body will be greatly affected. Exhaust fans are used to exchange more than 1500 chemical and bacterial pollution. Second-hand smoke odor and smog are all sucked away.Excellent and powerful capacitors, with large capacity to withstand higher voltage pulses, start faster and last longer.Double ball bearing wear-resistantWith a ground wire to reduce the damage caused by the current caused by thunder, the motor has a longer life.Product Features:※Product material: ABS※Motor material: pure copper bearing motorPlease allow 1-2cm error due to manual measurement.Please make sure you do not mind before you bid.