What is the rpm on these?

I am not sure of the exact rpm. I can tell you that I have 7 of these. 1 80mm, 4 120mm, 2 140 mm. I use them on top of my receiver, under my laptop, router and on my nas. Very quiet while still pushing or pulling a good cfm number. Sorry I do not know the exact rpm speed but if your looking at a home theatre application I think these will work great. If you want cfm and some noise is OK you can probably do better.

How many watts does it consume?

With the a/c adapter used, 1.8 watts. Used without the a/c adapter (as usb powered) .80 of a watt.

14 months ago I purchased 3 140mm units for 24x7 usage; all 3 now fail to spin and just jiggle when plugged in. Anyone else have high failure rate?

Out of three 140mm and four 120mm units, that I own and have been running for approximately 24 months... One failure. Sent it back and got a replacement with no issues; blade broke.

I see the power cord has a usb connector on one side. is the cord hard wired to the fan or is there a connector? if a connector what type?

It is a full powered USB port? Or does the fan speed switch also affect the power coming out of the USB female attached to the fan?

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AC Infinity MULTIFAN S4, Quiet 140mm USB Fan, UL-Certified for Receiver DVR PlayStation Xbox Computer Cabinet Cooling

Product ID: 6470798

Details

Brand
AC Infinity
Compatible Devices
Amplifier
Cooling Method
Air
Material
Rubber
Maximum Rotational Speed
2000 RPM
Noise Level
18 Decibels

⏳67,000 hrs dual-ball bearing lifespan

🌀57 CFM airflow

🔇Ultra-quiet 18 dBA noise

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€ 35.32

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Sold byAmazon PortugalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🆒 Stay cool, stay ahead—quiet power that works as hard as you do!

PLUG PLAY USB POWER - Effortless USB connectivity powers your fan from any device port
WHISPER QUIET COOLING - Keep your gear chill without the noise distraction
PRECISION SPEED CONTROL - Customize airflow with multi-speed settings for perfect balance
DURABLE DUAL BALL BEARINGS - Engineered for longevity—67,000 hours of reliable performance
VERSATILE MOUNTING OPTIONS - Lay flat or stand upright to fit any setup seamlessly

The AC Infinity MULTIFAN S4 is a UL-certified, ultra-quiet 140mm USB fan delivering 57 CFM airflow at just 18 dBA noise. Featuring durable dual-ball bearings rated for 67,000 hours, it offers versatile mounting and multi-speed control, powered conveniently via USB to keep your electronics and gaming consoles optimally cooled.

Specifications

ASIN	B00MWH4FL4
Air Flow Capacity	57 Cubic Feet Per Minute
Best Sellers Rank	#2 in Computer Case Fans
Brand Name	AC Infinity
Compatible Devices	Amplifier
Cooling Method	Air
Customer Reviews	4.7 4.7 out of 5 stars (36,859)
Global Trade Identification Number	00854759004365
Item Dimensions L x W x H	1"L x 5.5"W x 5.5"H
Item Weight	0.02 Pounds
Manufacturer	AC Infinity
Material Type	Rubber
Maximum Rotational Speed	2000 RPM
Model	AI-MPF140A
Noise Level	18 Decibels
Number of Items	1
Part Number	FBA_AI-MPF140A
Power Connector Type	4-Pin
UPC	854759004365
Unit Count	1 Count
Voltage	5 Volts
Wattage	1.5 watts

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