The NF-A9 is a highly optimised, premium quality quiet 90mm fan. Featuring Noctuas AAO (Advanced Acoustic Optimisation) frame as well as sophisticated aerodynamic design measures such as Flow Acceleration Channels, the NF-A9 further improves the renowned quiet cooling performance of the award-winning NF-R9. The FLX version provides 2000/1650/1200rpm speed settings via the supplied Low-Noise Adaptors in order to provide full flexibility in fine-tuning the fan for maximum ventilation performance or near-silent operation. Its superb running smoothness, reference-class SSO2 bearing and Noctuas trusted premium quality make it an elite choice for the highest demands.Specifications:- Dimensions: 92 x 92 x 25 mm (W x H x D)- Material: Plastic- Normal Mode: 1600 U / min, 17.1 dB (A) 64.6 m / h- With LNA: 1,250 rev / min, 11.6 dB (A) 51.1 m / h- With ULNA: 1050 U / min, 8.4 dB (A) 42.9 m / h- Voltage: 12 V- Power Consumption: 0.84 W, 0.07 A- Connector: 3-pin, 4-pin Molex adapter- Life expectancy 150,000 h- Manufacturer Warranty: 6 years- Accessories: - 2x voltage adapter (LNA, ULNA) - 3: 4-pin adapter - 92 mm adapter - 30 cm extension cable - 4x Fan screws - 4x Vibration inhibitors