Applied Science | Covert radio pen with bone conduction speaker @AppliedScience | Uploaded 9 years ago | Updated 16 hours ago
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I built a tiny radio into a ballpoint pen that allows the user to hear audio by casually biting the pen.
patreon.com/AppliedScience ---- Donate here!
I built a tiny radio into a ballpoint pen that allows the user to hear audio by casually biting the pen.