PC Fan NOCTUA NF-A4x20 FLX:This NOCTUA NF-A4x20 FLX fan fits even in the smallest spaces, providing reliable cooling for the computer components. 9 aerodynamic fan blades with a maximum speed of up to 5000 RPM ensure excellent airflow. Despite its power, the NOCTUA NF-A4x20 FLX fan is virtually inaudible due to its special low and ultra-low noise adapters that are included with the OmniJoin kit for easy connection to the proprietary connector. The fan design features a high-quality AAO frame with advanced Flow Acceleration Channels. The NOCTUA fan offers the user silent A-series cooling in up to 40mm format, powered by a 3-pin connector.Key features of the NOCTUA NF-A4x20 FLX fan40mm format fanAir coolingAdvanced aerodynamic designBlades and AAO premium quality frameLow noise adapterReference SSO2 bearingPowered via 3pin connectorComputer fan with an elegant brown designPackage contentsLow Noise Adapter (LNA)Ultra-Low Noise Adapter (ULNA)Extension cable with a length of 30cmOmniJoin adapter setNA-AV3 anti-vibration mountsScrews for fan mountingParameters:Bearings:SSO2Blade shape:A-Series with Flow Acceleration ChannelsFrame technology:AAO (Advanced Acoustic Optimisation)Maximum speed with LNA (+/- 10%):4400RPMMaximum speed with ULNA (+/- 10%):3700RPMMax airflow with LNA:8.3m3/hMaximum airflow with ULNA:6.9 m3/hMaximum acoustic noise with LNA:12.2dB(A)Maximum acoustic noise with ULNA:8.5dB(A)Power consumption:0.6WVoltage range:12VMTBF:>150,000hrs