Turn any headphones into bluetooth wireless headphones for $20

There are few things as unpleasant in life as getting a headphone cable snagged on a doorknob. Or the corner of a table. Or the watch of a total stranger passing me on the sidewalk.  Because the cable runs the length of my body, from the earbuds on my head to the phone in my pants pocket, it’s way too easy for it to get caught on just about anything, and it’s a truly jarring experience every time it happens.

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