Product :QF-1042B Fan ,elevator fanFeatures:1.New design,adopting multi-wing impeller2.Low noise,large input air,high-wind pressure3.Smart,light and long life4.convenience to load and discharge,safetyTechnical performance:1.Transmission speed:1200±100rpm,1000±100rpm2.Noise:≤50db(A), ≤46db(A)3.Blast volume 7.5±0.5m3/min,5.5±0.5m3/minTechnical data:1.Voltage:AC220V-240V AC100V-120V 50/60HZ2.Impeller size Diameter:100X425mm3.Air put size:36X430mm4.Power:35W5.Dimension:536X150X130mm