Wathai
Wathai 2pcs 40mm USB Cooling Fan 5V 4010 Mini PC Fan with Speed Controller
Bottom line: The Wathai 2pcs 40mm USB Cooling Fan 5V 4010 Mini PC Fan ($16.99 on Amazon as of 2026-10-20 22:16 UTC): Two 40mm fans per pack, so you can set up intake and exhaust at once; main trade-off: 6.12 CFM per fan is low airflow; not for full tower cases.
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*Price sourced from Amazon.com. Last updated 2026-10-20. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Two 40mm fans per pack, so you can set up intake and exhaust at once
- ✓ 5V USB power means no adapter, fan header, or splicing
- ✓ 2-in-1 inline controller adjusts both fans from one port
- ✓ Slim 10mm depth (40x40x10mm) fits sealed boxes and lids
Cons
- ✗ 6.12 CFM per fan is low airflow; not for full tower cases
- ✗ 25 dBA at 5500 RPM is audible in a quiet room
- ✗ Fixed 40mm frame won't cover 50mm or 60mm mounting holes
- ✗ No PWM or thermal sensor; speed is set manually
Manufacturer description
The Wathai 40mm USB Cooling Fan ships as a 2-pack of 4010-size fans sized for enclosures where nothing bigger fits. Each fan measures 40 x 40 x 10 mm (1.57 x 1.57 x 0.4 in.), runs on 5V USB power, and pushes 6.12 CFM at up to 5500 RPM while rated at 25 dBA. The included 2-in-1 speed controller drives both fans from a single USB port, so you can dial airflow down when noise matters and back up when a sealed box starts heat-soaking. Because the pair draws power straight from USB, there is no separate adapter or fan header to wire in. Plug into a laptop, a PS4 or Xbox port, or a powered USB hub…
SpecPicks Verdict
SpecPicks scored Wathai 2pcs 40mm USB Cooling Fan 5V 4010 Mini PC Fan using a rating × review-volume × price-fit model applied to published specs and reviews across the retro cpu coolers & fans category. Wathai'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.
Frequently Asked Questions
How loud is the Wathai 40mm USB fan?
Each fan is rated at 25 dBA at its 5500 RPM top speed. The included 2-in-1 speed controller lets you reduce RPM, which lowers noise further when full airflow isn't needed.
Will this fan work on a PS4 or Xbox?
Yes. Wathai lists PS4 and Xbox USB ports as intended power sources. The fan runs at 5V directly off the console's USB port with no external power supply.
What are the exact dimensions and airflow?
Each fan is 40 x 40 x 10 mm (1.57 x 1.57 x 0.4 in.), a standard 4010 size. Rated airflow is 6.12 CFM (+/-10 percent) at 5500 RPM on 5V.
Can I control the speed of both fans together?
Yes. The kit includes a 2-in-1 speed controller that powers and adjusts both 40mm fans from a single USB connection.
Is it enough airflow for a Raspberry Pi or router?
Wathai lists Raspberry Pi, routers, TV boxes, and small PC cases as target uses. At 6.12 CFM per fan, it suits small sealed enclosures rather than large cases.
How many fans come in the package?
Two 40mm fans plus the 2-in-1 speed controller.
Key Features
- Small USB fan: This 40mm mini USB computer cooling fan is ideal for DIY cooling in tight spaces, perfect for micro and computer fans, mini and small box fans, USB mini fans, and PS4 cooling
- Tiny fan: Suitable for ventilation of VR glasses, TV box, Raspberry pi, Router, Small PC Case, projector, hard hat and other small electronic equipment ventilation
- Computer fan usb powered: It can run these right off the laptop without an external power source. Usb fan for desk, no funky wiring, just plug it into the PS4 USB port and tuck the wires aside
- 2 In 1 Usb mini fan: Two 40mm fans with adjustable speed control for computers, home entertainment systems and other electronic devices running at ideal temperatures and optimal speeds
- 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 | Wathai |
|---|---|
| Model | 2pcsWDA6010S05N35U-35 |
| Voltage | 5 Volts (DC) |
| Material | Plastic |
| Dimensions | 40 x 40 x 10 mm |
| Unit Count | 2.0 Count |
| Noise Level | 25 Decibels |
| Part Number | 2pcsWDA6010S05N35U-35 |
| Connectivity | USB |
| Compatibility | PC, PS4, Xbox |
| Material Type | Plastic |
| Cooling Method | Air, cooling fan |
| Number of Items | 2 |
| Air Flow Capacity | 6.12 Cubic Feet Per Minute |
| Compatible Devices | Amplifier, Desktop, Gaming Console, Laptop, Printer, computer case |
| Power Connector Type | USB |
| Maximum Rotational Speed | 5500 RPM |
| Item Dimensions L x W x H | 1.57"L x 1.57"W x 0.4"H |
| Full listing title | Wathai 2pcs 40mm USB Cooling Fan 5V 4010 Mini PC Fan with Speed Controller | 2-in-1 speed controller Small Computer USB Fans for Welding Helmet, Aquarium, Terrarium, Camera, VR Receiver DVR PS4 Xbox |
Ready to buy?
Wathai 2pcs 40mm USB Cooling Fan 5V 4010 Mini PC Fan with Speed Controller | 2-in-1 speed controller Small Computer USB Fans for Welding Helmet, Aquarium, Terrarium, Camera, VR Receiver DVR PS4 Xbox 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 2026-10-20. Price and availability subject to change.
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