AmRunJe
AmRunJe USB Fan 40mm 2 Packs
Bottom line: The AmRunJe USB Fan 40mm 2 Packs ($11.04 on Amazon as of 2026-10-06): Runs off any 5V USB source: power bank, phone charger, console USB port; main trade-off: 25 dBA at 5500 RPM is audible in a quiet room.
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*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Runs off any 5V USB source: power bank, phone charger, console USB port
- ✓ Slim 40 x 40 x 10 mm frame slips into router gaps and tight case cutouts
- ✓ Brushless motor spins 5500 RPM for 6.12 CFM of active exhaust
- ✓ Metal finger guards included on both fans
Cons
- ✗ 25 dBA at 5500 RPM is audible in a quiet room
- ✗ 6.12 CFM only moves air in small enclosures, not full ATX cases
- ✗ No speed controller or PWM header, so it runs flat out
- ✗ Splitter ties both fans to one switch instead of separate control
SpecPicks Verdict
SpecPicks scored AmRunJe USB Fan 40mm 2 Packs using a rating × review-volume × price-fit model applied to published specs and reviews across the retro cpu coolers & fans category. AmRunJe's retro cpu coolers & fans lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for retro cpu coolers & fans 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 retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Key Features
- Wide Application: perfect for cooling laptop, wifi tower, 3d printer, cable modem, steam deck, vivarium, soldering, power amps, growing mushroom,etc. Ideal for small space cooling and exhaust as a tiny fan
- Usb compatibility: The micro fan can easily draw power from a USB adapter, a power bank, a phone adapter, a game console's USB port, or any USB dapter, making it super convenient to use
- Compact & Mini size: This mini usb fan fits tight spots like computer cases and routers. It's also great for small desk or computer gaps to cool electronics. Heads up: The 40mm fan runs fast for cooling, so it can be a bit noisy
- Extensive accessories: The 5v 40mm fan includes a pair of USB fans, a 2-in-1 power cord for simultaneous control, and a protective iron mesh to keep your hands safe
- Specification: 40 x 40 x 10 mm ( 1.57 x 1.57 x 0.4 in. ) | Rated Voltage : 5V | Airflow: 6.12 ±10%CFM | Noise: 25dBA | Speed: 5500 RPM
Full Specifications
| Brand | AmRunJe |
|---|---|
| Model | 4010X2S-USB FAN |
| Voltage | 5 Volts |
| Material | Plastic |
| Dimensions | 40 x 40 x 10 mm |
| Unit Count | 2.0 Count |
| Noise Level | 25 Decibels |
| Part Number | 4010X2S-USB FAN |
| Connectivity | USB, WiFi |
| Compatibility | PC, Xbox |
| Material Type | Plastic |
| Specification | 40 x 40 x 10 mm ( 1.57 x 1.57 x 0.4 in. ) | Rated Voltage : 5V | Airflow: 6.12 ±10%CFM | Noise: 25dBA | Speed: 5500 RPM |
| Cooling Method | Air |
| Number of Items | 2 |
| Air Flow Capacity | 6.12 Cubic Feet Per Minute |
| Compatible Devices | Amplifier cabinet incubator computer case vr Gaming Console |
| Included Components | mini usb fan,usb speed controller |
| Power Connector Type | USB |
| Extensive accessories | The 5v 40mm fan includes a pair of USB fans, a 2-in-1 power cord for simultaneous control, and a protective iron mesh to keep your hands safe |
| Maximum Rotational Speed | 5500 RPM |
| Full listing title | USB Fan 40mm 2 Packs, 5V Mini Cooling Brushless Fan for PC Computer PlayStation Xbox Router, Small Box Fan for Terrarium Aquarium Helmet Raspberry Pi |
Ready to buy?
USB Fan 40mm 2 Packs, 5V Mini Cooling Brushless Fan for PC Computer PlayStation Xbox Router, Small Box Fan for Terrarium Aquarium Helmet Raspberry Pi is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
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