TECHNICAL DATA: Fan speed: 200–1350 rpm, Airflow: 74 cfm | 126 m³/h, Noise Level: 0.3 Sone, Static pressure: 1.3 mmH₂O, Pin: 4-pin. Maximum rotational speed 1350 RPM. Power connector type 4-Pin. JAPANESE DUAL BALL BEARING: The premium quality Japanese dual ball bearing allows continuous operation 24/7 without the slightest compromise in performance.