Is the daisy chain port full, unswitched usb power, or is it controlled via the speed control? as it's located after the speed switch it wasn't clear.

The port is controlled by the switch. I got 4.9V on H, 4.4V on M, lower than 4V on L and no output on OFF.

can you use with xbox one,what is the USB type?

I put one of these on my Xbox One and it works great. It isn't loud at all and keeps my system cooler. It is a standard usb connection (not a mini or micro USB).

Will this centrifugal fan work better than the equivalent axial version behind a HEPA filter? I heard centrifugal fans work better with pressure drops

centrifugal fans work better when a pressure difference is necessary ie your HEPA filter, this fan will work better than an axle fan and as the filter starts clogging up will continue to pull air longer

Can you power the blower on full speed with the female usb port? i know that it is designed to power an additional fan.

No, the male usb is inline with the switch, that's how you connect it.

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AC Infinity, MULTIFAN S2 Quiet USB Cooling Blower

AC Infinity, MULTIFAN S2 Quiet USB Cooling Blower

Product ID: 16916738

Details

Brand
AC Infinity
Compatible Devices
Electronic
Cooling Method
Air
Material
Metal Plastic
Maximum Rotational Speed
2.5 rpm
Noise Level
17 db

💨35 CFM airflow

🔇Ultra-quiet 17 dBA noise

🔌USB-powered convenience

246 Lei

Duties & taxes included

In stock

Sold byAmazon RomaniaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💨 Stay cool, stay ahead — the silent fan your tech deserves.

CUSTOM SPEED CONTROL - Dial in the perfect airflow for your setup with multi-speed settings.
PLUG PLAY USB POWER - No bulky adapters—power directly from your device’s USB port.
WHISPER QUIET COOLING - Keep your gear chill without the noise distraction.
SLEEK LOW PROFILE DESIGN - Fits snugly in tight spaces, pushing hot air out the back effortlessly.
UL CERTIFIED RELIABILITY - Safety and performance you can trust for your valuable electronics.

The AC Infinity MULTIFAN S2 is a compact, UL-certified 120mm USB blower fan delivering 35 CFM airflow at an ultra-quiet 17 dBA noise level. Designed with a low-profile form factor and multi-speed controller, it efficiently cools electronics like AV receivers, gaming consoles, and modems by drawing heat out through the rear. Powered conveniently via USB, it combines reliable dual ball bearings and energy-efficient 1.2-watt operation to keep your devices running cooler and longer.

Specifications

ASIN	B012CL2V3I
Air Flow Capacity	35 cfm
Best Sellers Rank	#11 in Internal Fans & Cooling Components
Brand Name	AC Infinity
Compatible Devices	Electronic components, Desktop computers
Cooling Method	Air
Customer Reviews	4.7 4.7 out of 5 stars (1,530)
Item Dimensions L x W x H	1"L x 4.7"W x 4.7"H
Item Weight	8 ounces
Manufacturer	AC Infinity
Material Type	Metal, Plastic
Maximum Rotational Speed	2.5 rpm
Model	AI-MPB140A
Noise Level	17 db
Number of Items	1
Number of Packs	1
Part Number	AI-MPB140A
Power Connector Type	4-Pin
UPC	854759004495
Unit Count	1 Count
Voltage	5 volts
Wattage	1.2 watts

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