1.best motor,low noise 2.current:0.22-2.7A 3.power:60-850w 4.reasonable structure,durable reasonable structure,article external,durable ,lownoise,energy saving.applies for factories ,office,storage,dining room,the kitchen,basement to ventilate , exchange air and cool down.The Main Technical Parameters modeldia of impeller(mm)air volume(m3/min)power(w)voltage(v)current(A)frequency(HZ)speed(rpm)FA- ...