Why Choose This:★Higher air flow to enhance cooling performance.★Bearing Type: Sleeve Bearing; Speed (R.P.M.): 2700 R.P.M. (+ / - 10%).★Voltage: AC 220/240V; Rated Current: 0.22AMP★Dimension: 150 x 150 x 50mm / 5.91" x 5.91" x 1.97" (L*W*H)★Excellent performance and impeccable quality for dc cooling fan.