How quiet are these fans on High and will they run ok in a PC usb socket?

They are very quiet. They have three speed settings and are very quiet on all three. Will definately run from a USB socket. I have mine running in this manner no problems at all. What I did and I would recommend is to purchase the dust filters to use with them --> https://www.amazon.co.uk/gp/product/B076BJCYBY/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 These clip on and capture all the dust that the fans suck in. Saves you having to clean the blades so much and also if you are using them to cool a case then it stops the dust being pulled into the case. HTH.

I intend to use on my original xbox one. which way is best to use these when placed on top of the console? to blow air in or to extract air away?

I've not got an Xbox One, but on other devices (Sky Box and home cinema amp), they run noticeably cool when you extract the hot air away. I think not as much air will flow through trying to blow fresh air in, but it's easy to try both ways.

Can these fans be left running 24 hours a day

Yes I believe so. They are frictionless and appear to generate no heat. You could link them to a thermostat and they activate when required if you are nervous at leaving on. I have similar fans in my hub rack that are on 24-7.

Would they function well in high humidity? Are they likely to rust?

Not certain, electronics don't usually do well in high humidity. Having said that they are made of plastic and if your going to be using them to keep your amplifier cool there shouldn't be a problem. These are very good fans.

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AC Infinity, MULTIFAN S7 Quiet USB Cooling Fan

AC Infinity, MULTIFAN S7 Quiet USB Cooling Fan

Product ID: 56775161

Details

Brand
AC Infinity
Compatible devices
Digital Video
Cooling method
Air
Material
Rubber
Maximum rotational speed
1300 RPM
Noise level
19 Decibels

💨104 CFM airflow

🔇Ultra-quiet 19 dBA noise

🔋67,000 hrs dual ball bearing lifespan

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KSh13615

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Sold byAmazon KenyaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

❄️ Stay cool, stay ahead — silence is the new power move.

PLUG PLAY USB POWER - Seamlessly powers from any USB port on your AV or gaming setup.
WHISPER QUIET COOLING - Keep your gear chill without the noise distraction.
PRECISION SPEED CONTROL - Multi-speed dial lets you balance airflow and silence effortlessly.
SLEEK VERSATILE DESIGN - Compact 120mm fans lay flat or stand upright to fit any cabinet or console space.
DURABLE DUAL BALL BEARINGS - Engineered for 67,000 hours of reliable, maintenance-free operation.

The AC Infinity MULTIFAN S7 is a UL-certified, ultra-quiet dual 120mm USB fan delivering 104 CFM airflow at just 19 dBA noise. Designed with durable dual-ball bearings rated for 67,000 hours, it offers multi-speed control and versatile placement to optimize cooling for gaming consoles, DVRs, and AV cabinets. Powered via USB, it’s the premium choice for professionals demanding silent, efficient electronics cooling.

Specifications

ASIN	B00JLV4BWC
Air Flow Capacity	104 Cubic Feet Per Minute
Best Sellers Rank	2,912 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 2 in USB Fans
Brand	AC Infinity
Compatible Devices	Digital Video Recorder, Receiver
Cooling Method	Air
Country Of Origin	China
Customer Reviews	4.6 4.6 out of 5 stars (35,214)
Included Components	Cord
Item Dimensions L x W x H	15L x 10W x 2H centimetres
Manufacturer	AC Infinity
Manufacturer Part Number	ACAIMPF120A2
Material	Rubber
Max Rotational Speed	1300 RPM
Model Number	AI-MPF120A2
Noise Level	19 Decibels
Number of Items	1
Power Connector Type	USB
UPC	854759004341
Unit Count	1.0 count
Voltage	12 Volts
Wattage	5 watts

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