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 Sep 15 - Sep 20

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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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    4.2 ★★★★★
    Based on 18 reviews
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    Product Reviews
    J
    Verified Purchase
    Jimmy
    Port Orchard, US
    ★★★★★ 5
    Takes a Licking and Keeps on Ticking
    Color: Green/Black
    I love this watch despite the fact that it is really a toy. I love the look of the watch, I love how lite the weight of the watch is on my wrist, and it really does keep good time if you manage the solar charge properly. Other than looking cool on your wrist, this watch has absolutely no functions other than time keeping. The black plastic bezel is molded into the case and does not turn, so don't plan on using that. The watch has no light, the dial numbers are non-luminous and the hands are very limited in terms of luminosity. No buttons. All you can do is adjust the time and date by pulling out what used to be a winding stem in the good old days. The small tag on the strap with Geographic coordinates shown on it indicate the location of the old Timex manufacturing facility (SW of Waterbury, CT). I have a nice ledge at my bedroom window and it gets good western sun for a good part of the day regardless of the time of year. On this ledge you will find a half dozen solar powered watches (mostly Casio) properly aligned to maximize the charge they may receive each day. Note that the description for this Timex watch specifically states that a lightbulb won't charge this watch. You need direct sunlight for several hours if you want to get more than a 3-week charge into this watch. So, I'll leave you with a couple of tips, my friends; 1.) If you are looking for a first watch to give your outdoorsy oriented Son or Daughter, then give them this one. Why? Because it is cool looking, fairly well built, and it actually works, 2.) After you receive your Timex watch, be sure to keep the display mount it is packaged with. It makes a great fixture to mount your watch on for charging and allows you to maximize the position of the solar cells on the dial so that you can optimize charging time. Have Fun! Jimmy
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on February 28, 2026
    N
    Verified Purchase
    Nuka Shroom Soup
    Los Angeles, US
    ★★★★★ 5
    Excellent value, flawless performance for well over a year and no signs of quitting.
    Color: Green/Black
    Excellent value, had this for well over a year and it still keeps perfect time, still water resistant. No worries about having to change batteries. Owned a fancy expensive (battery) watch once and the dept. store repair intentionally sabotaged the watch in the hopes I would purchase another from them. Yeah, good luck with that, lost my business forever. This is the 21st century, cell phones are the new time pieces, but solar is totally reliable and Timex makes it happen. Holds a charge for many months, although I prop it in a bright window for a few days every few months or so just to make sure the cells are always fully charged, although it's probably unnecessary, just being over cautious. I haven't actually experienced this watch ever running out of power even after months of use. Damn impressive, as it should be.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on October 12, 2025
    B
    Verified Purchase
    Bill
    Whiting, US
    ★★★★★ 4
    Good value for solar watch
    Color: Black/Orange
    Nice watch! It is plastic like but it is solar. No indiglo button only a little luminous on the hands so you don't want to wear it in tje dark and expect to check the time. 45mm case is good size for my wrist and the band works good also, Not too long not too short. Overall a good watch with no problems
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 6, 2026
    B
    Verified Purchase
    Barry Vercueil
    Port Orchard, US
    ★★★★★ 5
    Amazing Solar for the price
    Color: Black/Orange, Color: Black/Orange
    Great watch. Very good visibility. Ligh and feels quality. Easy to swap straps. Same size as my Casio Duro. Highly recommend.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 30, 2026
    J
    Verified Purchase
    Jason G
    Port Orchard, US
    ★★★★★ 1
    Do not buy
    Color: Green/Black
    Do not buy. When I received the watch it did not work and the battery was dead. I bought a new battery and it killed that one as well after about a month.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on March 18, 2026

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