Features (G16060): 1) Frequency: 50/60Hz 2) Input power: 30W 3) Speed: 2,500r/min 4) Noise: 65dBA 5) Air flow: 5.5m3/min 6) Bearing type: ball Features (G2170): 1) Frequency: 50/60Hz 2) Input power: 65W 3) Speed: 2,500r/min 4) Noise: 70dBA 5) Air flow: 13m3/min 6) Bearing type: ball