The NF-A8 is a highly optimised, premium quality quiet 80mm fan. Featuring Noctuas AAO (Advanced Acoustic Optimisation) frame as well as sophisticated aerodynamic design measures such as Flow Acceleration Channels, the NF-A8 further improves the renowned quiet cooling performance of the award-winning NF-R8. The PWM version sports Noctuas custom designed NE-FD1 IC for fully automatic speed control via 4-pin fan headers and comes with a Low-Noise-Adaptor to reduce the maximum speed during PWM control from 2200 to 1750rpm. Its superb running smoothness, reference-class SSO2 bearing and Noctuas trusted premium quality make it an elite choice for the highest demands.Specifications:- Dimensions: 80 x 80 x 25 mm (W x H x D)- Material: Plastic- Normal mode: 450 to 2200 U / min, 17.7 dB (A), 55.5 m / h, 2.37 mmH2O- With LNA: 1,750 r / min, 13.8 dB (A) 43.9 m / h, 1.54 mmH2O- Voltage: 12 V- Power Consumption: 0.96 W, 0.08 A- Connector: 3-pin, 4-pin Molex adapter- Life Expectancy: 150,000 h- Manufacturer Warranty: 6 years- Accessories: - 1x power Adapter (LNA) - 4-pin Y-adapter - 30 cm cable extension - 4x Fan screws - 4x Vibration inhibitors