SKU: 33232255303

AC Infinity MULTIFAN S4 Quiet USB Cooling Fan 140mm

Sale price$36.89 Regular price$40.99
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Ships within 48 hours · Estimated delivery Jul 16 - Jul 21

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Description

AC Infinity MULTIFAN S4 Quiet USB Cooling Fan 140mmDescription Ultra quiet UL certified USB fan designed to cool various electronics and components. 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 popular AV electronics and game consoles. Fan Size: 5. 5 x 5. 5 x 1 in. Airflow: 57 CFM Noise: 18

Description
  • Ultra-quiet UL-certified USB fan designed to cool various electronics and components.
  • 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 popular AV electronics and game consoles.
  • Fan Size: 5.5 x 5.5 x 1 in. | Airflow: 57 CFM | Noise: 18 dBA | Bearings: Dual Ball
  • Product Description: The ultra-quiet cooling fan can be positioned to stand upright or laid flat to cool various electronics and components. Features a multi-speed controller with power switch. Includes eight large anti-vibration rubber feet and a 6-foot power cord. The USB plug can be plugged into the USB ports found behind popular electronics such as receivers and video game consoles. Each unit contains an additional USB port, up to four fans can be daisy chained together to share the same power source. This fan system is CE and RoHS certified and contains premium dual-ball bearings, allowing it to be mounted horizontally or vertically. Contains AC Infinity axial fans ACX-FD1425(B)05W3 which meet UL-507 standards for safety under Underwriters Laboratories certificate E503903.
  • Speed Controller: The fan includes an in-line multi-speed controller with power switch to set the fan's speed to optimal noise and airflow levels for various environments.
  • Connecting Additional Units: For electronics and components that requires more airflow, each fan unit can daisy chain additional MULTIFAN S series fans. Up to four fans can share the same USB power source; and up to six fans can share the same thermal controller (sold separately). MULTIFAN S1, S2, S3 and S4 contains one fan, and MULTIFAN S5 and S7 contains two fans.
  • Applications: This ultra-quiet cooling fan is popular in a variety of electronics and components such as receivers, DVRs, video game consoles, modems, computers, amplifiers, and other audio video equipment.
  • Specifications
  • Product Identification
  • Manufacturer: AC Infinity Inc.
  • Product Name: MULTIFAN S4
  • Product Model: AI-MPF140A
  • UPC Code: 854759004365
  • Product Dimensions
  • Total Dimensions: 5.5 x 5.5 x 1.0 in. (14.0 x 14.0 x 2.5 cm)
  • Hole to Hole Distance: 4.92 x 4.92 in. (12.5 x 12.5 cm)
  • Screw Hole Diameter: 0.17 in. (0.4 cm)
  • Cord Length: 72 in. (6 feet)
  • Total Airflow: 57 CFM
  • Total Noise: 18 dBA
  • Speed: 1200 RPM
  • Operating Voltage: 3 to 7V DC
  • Power: 1.5 W
  • Current: 0.3 A
  • Wall Adapter Input: 100 to 240V AC
  • Static Pressure: 0.84 mm-H2O
  • Operating Humidity: 35 to 85% RH
  • Operating Temperature: 0 to 158 degrees F
  • Fan Bearings: Dual Ball
  • Mounting Positions: Horizontal or Vertical
  • L10 Life Expectancy: 67,000 Hours
  • Data Sheets
  • Download the AC Infinity DC Fans UL C UL Recognized E503903: here
  • Download the AC Infinity MULTIFAN Series CE Certificate CTL1811096016 EC: here
  • Download the AC Infinity Fans RoHS Certificate SZXEC1900087001: here
  • Download the user manual: here
  • Shipping Notes
    • Free Standard Shipping on $100+ Orders to the USA.
    • Except Preorder products are shipped in 48 hours.
    • Delivery to the USA:
    1. Standard Shipping : 3-10 business days
    • If time is of the essence, please consider selecting expedited delivery for faster service.
    Exchange/Return Notes
    • We offer a 30-day return/exchange service after receiving.
    • Final sale items are not eligible for returns or exchanges.
    • To process your return/exchange, please contact us at [email protected]
    • Please click here for more details>>> Return & Exchange Policy
    SKU: 33232255303

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    4.8 ★★★★★
    Based on 10 reviews
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    R
    Verified Purchase
    Raptor
    Pawtucket, US
    ★★★★★ 5
    Near OEM quality at 1/4 cost
    Near OEM performance at 25% of the cost! Bosch Quality replaced NGKs/Toyota OEMs. Great value and now the engine is running smoothly! I have seen a slight improvement in my mpg @1mpg overall in mixed driving conditions.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 22, 2026
    J
    Verified Purchase
    Joe H.
    Draper, US
    ★★★★★ 5
    Very Expensive
    Had one cylinder misfiring so replaced coil and spark plug. Runs fine now, but old plug looked shot after only 5 months so I think the coil was the problem. Really good plug so far but very expensive.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on February 12, 2026
    R
    Verified Purchase
    rkab8745
    Boise, US
    ★★★★★ 5
    A reliable set of spark plugs.
    They’re made in Germany, what else can you say
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 24, 2026
    A
    Verified Purchase
    Amazon Customer
    Houston, US
    ★★★★★ 5
    Work as well as the NGK's
    Bought for a 2016 Mazda 6, I had NGK's in it for 5 months and had misfires, didnt have the money to throw more NGK's at it for troubleshooting. Bought these to try and they work great so far.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 29, 2026
    C
    Verified Purchase
    Christopher D. Bodirsky
    Bozeman, US
    ★★★★★ 4
    Faulty plug? Otherwise great set
    Definitely better than the old plugs that probably had 80k miles on them. The one star off is because I had a misfire after installing. Not sure if I damaged the plug or what, but a reinstall didn't fix the misfire. In my genius, I rushed to try to gap it and ended up breaking the iridium tip. Put the old plug into cylinder 3 (where the misfire was) and it was fine. Gonna have to get a new single tomorrow at my local shop, but a bit frustrating to get a misfire after install.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 27, 2026

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