E171: What Is This Thing?
Welcome to Edition 171 of What Is This Thing?, my recurring visual riddle series consisting of one simple photo - see above - and one simple question: what is this thing?
Below are a few hints to help you out.
- You use it for only 1 second a pop.
- Its function is to test one of yours.
- It doesn't blow, dude, you blow!
Ready to solve the puzzle? Click here to find out what is this thing.
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