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USB fan clock(r/pics)
Here it is on Amazon, but the reviews don’t say very good things.
edit: here’s an apparently better version: www.amazon.com/Ruishengda-Clock-Display-Function-S…
edit2 11 hrs after post: the second link has some sketchy reviews as many have pointed out. Product is likely a piece of shit that will break within a week but it’ll be kinda cool for like 5 minutes so ¯_(ツ)_/¯