40-mm 3-pin fan from Noctua with flow channels and Acceleration 3700-4500 rev / min, 6.6 to 8.2 m / h, 12.9 to 17.9 dB (A)Specification:- Bearing Type: SSO2 Bearing- Journal of Geometry: A Series with Flow Acceleration Channels- Rotational. (+ / -10%) 4.500 U / min- Rotational. with LNA (+ / -10%): 3,700 r / min- Flow: 8.2 m / h- Airflow with LNA: 6,6 m / h- Noise level: 17.9 dB (A)- Acoustical Noise with LNA: 12.9 dB (A)- Static Pressure: 1.78 mm H2O- Static Pressure with LNA 1,21 mm H2O-max. Power consumption: 0.6 W-max. Current: 0.05 A- Operating voltage: 12 V- MTBF:> 150.000 h- Connector: 3-pin- Size: 40(W) x 40(L) x 10(D) mm- Manufacturer Warranty: 6 yearsContent:- Low-Noise Adaptor (LNA)- 4 Vibration Compensators- 3-pin to 2-pin adapter-30 cm cable extension- 4 vibration dampers- 4 Fan Screws