shockwatches
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This 1920s Shockwatch Was Like A Taser For Your Wrist
While those of us here in the early 21st century argue over the future of smartwatches and smart rings, inventors of the 1920s would probably think we’re all a bunch of babies. Sure, your Pebble might have caller ID. But can it incapacitate a potential mugger with a 10,000-volt high-frequency shock? I didn’t think so.