The craziest things you can plug into your iPhone's audio jack
The 3.5mm jack on your iPhone is lovingly referred to as the "headphone jack," because that's what the overwhelming majority of us use it for. But the diminutive port has other uses as well, and there are some pretty crazy things you can do with it. Here are some of the strangest accessories that can be plugged into that otherwise unremarkable hole on your iPhone.
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