Higher air flow to enhance cooling performance. Dimension: 120 x 120 x 38mm / 4.72" x 4.72" x 1.5" (L*W*H) Voltage: AC 220-240V; Rated Current: 0.14AMP Bearing Type: Sleeve Bearing; Speed (R.P.M.): 2700 R.P.M. (+ / - 10%).