“Very quiet, doesn’t distract from using the Pi in a quiet room at all, and is on by default if you don’t have chance to install the useful extra software.”
“The shim works great. Running a Pi 4 and it keeps it under 80c when running a long sysbench. If using the factory Pi 4 case, you will need to drill holes in the top so as air to flow.”
“Good little unit had in issue with the switch on mine giving up on day 2 replaced no quibbles photo provided, thank you for the good customer service”