Review on 💪 Powerful PoE HAT for Raspberry Pi 4 - Enhanced Cooling Fan Included by Brono Parks

Runs the Pi4 with no problems but as other reviews have written the fan makes a high pitched hum. When the board is idle and the fan is running at low speed, the audio is too loud and high-pitched to be comfortable. I had it in my office/network lab and had to discontinue it because it was annoying to work with. I sent it back because I didn't think it should make that noise all the time. I'm sure that would be great, but not if you're in the same room.