Experience superior cooling with NF-A9 PWM chromax.Black.swap, a premium 92x92x25mm quiet fan. Operating at 12V with a 4-pin PWM, it achieves a maximum speed of 2000 rpm and a noise level of just 22.8 dB(A), ensuring over 150,000 hours of mean time to failure. Designed for excellence, this award-winning 92x25mm A-series fan features Flow Acceleration Channels and an Advanced Acoustic Optimisation frame, enhancing airflow and reducing noise for unmatched cooling performance in your computing environment. Perfectly suited for 9cm CPU coolers like theNH-U9(S) & NH-D9L series, as well as compact PC cases including HTPC, ITX, and Small Form Factor builds. It's also an excellent replacement fan for NAS systems and other devices requiring efficient, quiet cooling. The 4-pin PWM version of this fan supports automatic speed control via PWM fan headers, offering a broad 400-2000rpm speed range. It can stop completely at 0% PWM, making it ideal for semi-passive systems that require silent operation during low-load periods. Enhance your system's aesthetics with the chromax.black.swap edition's all-black design and interchangeable anti-vibration pads in red, black, white, blue, yellow, and green. Customize the look to match your style with four pads of each color included. Colour:Black Material:plastic Package Contents: 1 * Quiet Fan Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.