Review on Raspberry IUniker 30X30X7Mm Brushless RetroFlag by Black Croom

I connected both fans to the same USB port on my computer. I started getting pop-up messages saying "Unknown USB Device" every 5 seconds. I turned off a fan and got the same "Unknown USB device" message, but now it was about every 15 seconds. Tried 3 different USB ports. Then I put them in a USB charger and I smelled something like something starting to burn in the fans. I then connected a fan with a different name to the same USB ports on the computer. The message has not arrived. It's been working for 3 hours, no messages. That's what I expected.