4 Pack USB Brushless Cooling Fan 40mm High Performance DC 5V Speed 4200 RPM for Small Appliances Series Replacement For Desktop

SpecPicks Verdict

SpecPicks classifies 4 Pack USB Brushless Cooling Fan 40mm High Performance DC 5V Speed… as a niche pick — read recent reviews before buying in the cases & modding category, based on our editorial and benchmark analysis and our ranking model that weights rating × review-volume × price-fit. UMLIFE's positioning sits within the broader category mid-tier. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.

Common buyer scenarios for cases & modding of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.

Key Features

• ❃❃ Fan size: 40x40x10mm(L*W*H); Rated Voltage: 5V DC, Current: 0.21A.
• ❃❃ Airflow: 3CFM, Speed: 4200±5%PRM, Noise: 22 DBA.
• ❃❃ Bearing Type: Oil Bearing.
• ❃❃ Lead Wire: USB; Length: Approx.1m / 39.37 in.
• ❃❃ Package Included: 4 * DC brushless fans.(Notice: 'DO NOT GET WET' or 'Put it in a humid environment'; Or it will stop working. Any questions, you can contact us and we will help you.)

Full Specifications

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4 Pack USB Brushless Cooling Fan 40mm High Performance DC 5V Speed 4200 RPM for Small Appliances Series Replacement For Desktop is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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*Price sourced from Amazon.com. Last updated 2026-07-23. Price and availability subject to change.