Oldfart
FRF Addict
No IDEA!! I was surprised when I saw that was a feature. Maybe in case you forget it's in your pocket and throw it in the wash? I like it because it's so tiny, it's only about a 1/2 X 3/4".Why do you need a waterproof USB? Nevermind, I don't want to know.
You should maybe pull out every now and then.
I've always hated pulling out!
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