They show a 5 blade and 7 blade fan, which is it. Looks like they send a 5 blade fan, is it loud?

I don’t have it in front of me at the moment but, if I remember correctly it’s a 5 blade. No it’s not loud at all; you can wire it up for 2 speed options. Low is basically silent as far as fans go and high is quiet enough to have a quiet conversation over without disruption, more then a few feet away and you can’t hear it. Also it does keep the chip temperature in the safe zone under a maxed out load for multiple hours.

What size is the fan?

Hello, friend, the size of raspberry pi fan is 35mm, model 3510, I hope it can help you.

Is this a suitable case to be fit on the back of a rp4 screen like this? https://www.amazon.com/osoyoo-touchscreen-raspberry-capacitive-compatible/dp/

Your link didn’t work.. but I looked it up and if it’s the same one I found than it will be a monitor that hangs loose outside of the case atta he’s by the ribbon cable. This touchscreen monitor attaches by screws to the board, and the miuzei case occupies those screw holes. You may be able to modify the miuzei case by screwing this monitor to it, but it may take some modifications. Maybe different screws or even some cutting.. so.. there’s no guarantee since this monitor is not designed to work with this case.

Could I use a potentiometer for a variable speed fan?

Theoretically, it is feasible to change the fan speed by adjusting the voltage through the potentiometer. We have not tried this part. You should test it yourself. I hope it can help you!

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Raspberry Pi 4 Case

Product ID: 253294549

Details

Brand
Miuzei
Case type
Mid Tower
Colour
Black/Blue
Motherboard compatability
Mini ITX
Recommended uses for product
Business

🔍Transparent acrylic shell for full visibility

🔧4 aluminum heatsinks for max heat dissipation

❄️Silent 35mm fan for rapid cooling

75607CFA

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Description

❄️ Cool your Pi, rule your projects — stay ahead in the maker game!

CRYSTAL CLEAR CONTROL - Show off your build with a sleek transparent acrylic case that never blocks Wi-Fi or Bluetooth signals.
PLUG PLAY PORT ACCESS - Seamlessly connect all your peripherals with full access to USB-C, dual HDMI, Ethernet, GPIO, camera, and microSD ports.
BEGINNER FRIENDLY ASSEMBLY - Quick and easy to assemble with included screwdriver and step-by-step video—perfect for pros and hobbyists alike.
EFFORTLESS COOLING MASTERY - Keep your Pi 4 blazing fast and cool under pressure with a whisper-quiet 35mm fan and 4 precision aluminum heatsinks.
STABLE SCRATCH FREE SETUP - Rubber feet provide a sturdy, scratch-proof base while optimizing airflow from below for enhanced thermal performance.

The Miuzei Case for Raspberry Pi 4 Model B 4GB combines a silent 35mm cooling fan with 4 aluminum heatsinks inside a transparent acrylic shell, ensuring optimal thermal management and full port accessibility. Designed for easy assembly and stable placement with rubber feet, it’s the perfect upgrade for professionals and enthusiasts seeking reliable performance and sleek aesthetics.

Specifications

ASIN	B07VX3HQGJ
Antenna Location	Business, Gaming
Brand	Miuzei
Case Type	Mid Tower
Case type	Mid Tower
Color	Black/Blue
Colour	Black/Blue
Compatible Devices	pi 4, raspberry pi, raspberry pi 4, raspberry pi 4 8gb, raspberry pi 4b
Cooling Method	Air
Customer Reviews	4.4 out of 5 stars 944 Reviews
Enclosure Material	Acrylic
Fan Size	35 Millimeters
Hard Disk Form Factor	3.5 Inches
Item Type Name	raspberry pi case
Item Weight	0.15 Kilograms
Light Color	RGB, led
Manufacturer	Miuzei
Material	Acrylic
Mfr Part Number	MC11-4-P-F
Model Name	case for raspberry pi 4
Model Number	raspberry pi 4 case
Motherboard compatability	Mini ITX
Number of Fans	4
Other Special Features of the Product	Acrylic Raspberry Pi 4 Case with Cooling fan Heatsinks and Rubber feet, Easy Access come with assembly video
Power Supply Mounting Type	Bottom Mount
Recommended uses for product	Business, Gaming
Supported Motherboard	Mini ITX
Total Expansion Slots Quantity	1
Total USB 2.0 Ports	2
Total Usb Ports	2
UPC	824918029881
Unit Count	1.0 Count

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