--- product_id: 63275470 title: "AC Infinity MULTIFAN Mini, Quiet Compact 40mm USB Fan w/ Speed Controller" brand: "ac infinity" price: "Β£21.58" currency: GBP in_stock: true reviews_count: 13 url: https://www.desertcart.co.uk/products/63275470-ac-infinity-multifan-mini-quiet-compact-40mm-usb-fan-w store_origin: GB region: United Kingdom --- # 67,000 hrs dual-ball bearing lifespan 12 CFM airflow 18 dBA ultra-quiet AC Infinity MULTIFAN Mini, Quiet Compact 40mm USB Fan w/ Speed Controller **Brand:** ac infinity **Price:** Β£21.58 **Availability:** βœ… In Stock ## Summary > πŸ†’ Stay cool, stay ahead β€” the mini fan with mega performance! ## Quick Answers - **What is this?** AC Infinity MULTIFAN Mini, Quiet Compact 40mm USB Fan w/ Speed Controller by ac infinity - **How much does it cost?** Β£21.58 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/63275470-ac-infinity-multifan-mini-quiet-compact-40mm-usb-fan-w) ## Best For - ac infinity enthusiasts ## Why This Product - Trusted ac infinity brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Universal USB Power:** Plug into any USB port or power bank for instant, portable cooling wherever you go. - β€’ **Ultra-Compact Design:** Sleek 1.6 x 1.6 x 0.8 in footprint fits anywhere, from desks to DIY projects. - β€’ **Whisper-Quiet Operation:** At just 18 dBA, stay cool without the distracting humβ€”focus mode activated. - β€’ **Durable Dual-Ball Bearings:** Engineered for longevity with 67,000 hours of reliable, smooth performance. - β€’ **Precision Multi-Speed Control:** Customize airflow and noise to fit your workspace vibe perfectly. ## Overview The AC Infinity MULTIFAN Mini is a compact, energy-efficient USB fan delivering 12 CFM airflow with whisper-quiet 18 dBA noise levels. Featuring a multi-speed controller and durable dual-ball bearings rated for 67,000 hours, it offers customizable cooling for any USB-powered setup. Perfect for professionals seeking discreet, reliable ventilation in a sleek, portable design. ## Description Multi-speed controller The power switch allows you to adjust the fan speed to optimal noise and airflow levels for different applications and noise environments. ## Features - Compact and energy-efficient USB fan designed various DIY cooling and ventilation projects. - Features a multi-speed controller to set the fan’s speed to optimal noise and airflow levels. - Dual-ball bearings have a lifespan of 67,000 hours and allows the fans to be laid flat or stand upright. - USB plug can power the fan through USB ports found behind electronics and on portable power banks. - Dimensions: 1.6 x 1.6 x 0.8 in. | Airflow: 12 CFM | Noise: 18 dBA| Bearings: Dual Ball ## Technical Specifications | Specification | Value | |---------------|-------| | Air Flow Capacity | 12 cfm | | Asin | B07CNJ4DYX | | Best Sellers Rank | #12 in USB Fans | | Brand Name | AC Infinity | | Compatible Devices | Devices with USB port | | Cooling Method | Forced air, forced convection | | Customer Reviews | 4.3 4.3 out of 5 stars (1,151) 4.3 out of 5 stars | | Item Dimensions L X W X H | 0.8"L x 1.6"W x 1.6"H | | Item Highlight | UL-Certified, Dual-Ball Bearings, VR Gear, Aquarium, Roku, Router, Raspberry Pi, Cosplay, Helmet Cooling Ventilation | | Item Weight | 9.07 g | | Manufacturer | AC Infinity | | Material Type | Rubber | | Maximum Rotational Speed | 6000 rpm | | Model | AI-MPF40A | | Noise Level | 18 db | | Number Of Items | 1 | | Number Of Packs | 1 | | Part Number | AI-MPF40A | | Power Connector Type | 4-Pin | | Unit Count | 1 Count | | Upc | 819137020559 | | Voltage | 12 volts | | Wattage | 18 watts | ## Product Details - **Brand:** AC Infinity - **Compatible Devices:** Devices with USB port - **Cooling Method:** Forced air, forced convection - **Material:** Rubber - **Maximum Rotational Speed:** 6000 rpm - **Noise Level:** 18 db - **Power Connector Type:** 4-Pin - **Product Dimensions:** 0.8"L x 1.6"W x 1.6"H - **Voltage:** 12 volts - **Wattage:** 18 watts ## Images ![AC Infinity MULTIFAN Mini, Quiet Compact 40mm USB Fan w/ Speed Controller - Image 1](https://m.media-amazon.com/images/I/61hGpzdOvML.jpg) ![AC Infinity MULTIFAN Mini, Quiet Compact 40mm USB Fan w/ Speed Controller - Image 2](https://m.media-amazon.com/images/I/715TZNiNZAL.jpg) ![AC Infinity MULTIFAN Mini, Quiet Compact 40mm USB Fan w/ Speed Controller - Image 3](https://m.media-amazon.com/images/I/61937PlfmYL.jpg) ![AC Infinity MULTIFAN Mini, Quiet Compact 40mm USB Fan w/ Speed Controller - Image 4](https://m.media-amazon.com/images/I/71Wzh47qmHL.jpg) ![AC Infinity MULTIFAN Mini, Quiet Compact 40mm USB Fan w/ Speed Controller - Image 5](https://m.media-amazon.com/images/I/61-6CgQl2iL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Ugly yet effective replacement cooling for Intel Compute Stick PC *by on Reviewed in the United States November 5, 2019* As an IT Admin for a small Transportation Company we have a large monitor set up so we can view all of our vehicles out on the road. After the remodel we wanted a better solution than using an older Dell PC which was using up precious desk space. We purchased an Intel W5 Pro with an Atom x5-z8350 & 2GB of Ram running Windows 10 Pro. As we just needed it to display a web browser we felt this solution which would free up space as well should do the job.After a few months of 24/7 operation I noticed the fan was starting to fail and temps started to rise. Finding the actual replacement fan didn't seem to be an option due to how proprietary the little fan was. Looking for a USB powered alternative I stumbled across this, took off the case on the W5 and strapped it to the top.Ugly? Sure, but as you can see adding the fan brought temps down from 70/80c to 36c!! With averaging around 55 or so with a moderate work load. As far as acoustics it's fairly silent on the lowest fan speed setting. I experimented with turning the speed up but didn't make that much of a difference. So keeping it on the lowest setting is best.The monitor has a USB port where it pulls power and the nice thing is that it will go to sleep when the monitor does. It is not connected to the compute stick as I didn't want to stress the little device any further.So... great little fan for 10 bucks. Moves a good amount of air, is quiet and has 3 speed settings. I highly recommend it. ### ⭐⭐⭐⭐⭐ Great Little Fan! *by on Reviewed in the United States August 25, 2026* Dont believe? Trust the plants! If you know begonias, they HATE water sitting in their leaves. Look at how theyre thriving in a high humidity, low vpd enviornment. The fan dries em off before they throw a fit in a pretty large enclosure.I'm using this along with some other ac infinity hardware to keep my GTPs bioactive enclosure in check and so far so good. Outstanding results. I can mist in the mornings, keep the fan on low for air exchange and evaporation and it keeps the VPD, humidity and temps in check on just LOW while I'm at work. Get home and the top of the soil is dry as its supposed to be, bottom remains moist for the clean up crew and he gets his drier period for the day while drying off plant leaves from the misting. It's TINY! But I can believe the 12cfm claim. Does the job in a 4ft tall, 30in deep, 4ft wide enclosure acting as an exhaust fan. ### ⭐⭐⭐⭐ Really puts the FAN in fantastic! *by on Reviewed in the United States February 20, 2020* I bought four of the 4" fans to squeeze into the rear slots in my entertainment cabinet. I suspected that I could use the silicone rubber feet to mount the fans, and it worked! The fans are held in place solely by the tight fit of the silicone washers against the edges of the cable cut-outs in the back of the cabinet.Since they are tight, and the rear of the cabinets are thin wood, at their highest RPMs, the fans make noise louder than the Xbox One X in the cabinet. However, at the "Medium" settings, the fans are no louder than the game console, and at the "Low" settings, the fans in the game console are louder.They really move a lot of air at the highest setting. I could feel quite warm air exiting the cabinet from the fans directly behind the Xbox One X, which vents heat out the rear of its housing. The other fans that were pulling air from mostly empty space were blowing out cool air.You can daisy-chain these together, but the speed control seems to affects all the other fans downstream. I had four of these connected together, with only one of them plugged into USB power. When I set the fan plugged into power to Low, the fan at the end of the chain stopped. Presumably, the other fans slowed down. ## Frequently Bought Together - AC Infinity MULTIFAN Mini, Compact 40mm x 20mm USB Fan, UL-Certified for VR Gear, Aquarium, Roku, Router, Raspberry Pi, Cosplay, Helmet Cooling Ventilation - AC Infinity MULTIFAN S1, Quiet 80mm USB Fan, UL-Certified for Receiver DVR PlayStation Xbox Computer Cabinet Cooling - AC Infinity Turbo Fan Power Adapter, for MULTIFAN Series USB Fans --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/63275470-ac-infinity-multifan-mini-quiet-compact-40mm-usb-fan-w](https://www.desertcart.co.uk/products/63275470-ac-infinity-multifan-mini-quiet-compact-40mm-usb-fan-w) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-09-07*