This is the best general purpose, USB powered, adjustable speed, muffin fan on a stand. It is great for random cooling of equipment, or blowing away solder fumes. I bought it to cool an external NAS drive I have on my home network. The adjustability lets me turn down the speed so that it’s almost inaudible. USB power is becoming ubiquitous around computer equipment, so it is conveniently powered.
A cool tool is anything useful that is superior to comparable items. If you think this tool is inferior suggest a better one. You are welcome to insult a tool, but comments containing insults to individual people will be deleted. Corrections of fact are always welcomed, if stated politely. Recommendations of better tools are dearly wanted and may be elevated to the front page.