
I have a very basic Callaway GPS watch that uses this magnet to attach a USB charging cable with a 4mm (0.16 inch) electrical contact gap (most universal cables are 2, 84mm). Proper pin spacing (and magnet spacing) and polarity are correct for my device (ie magnets only attach one way and electrical polarity is correct for my device). The quality looks good (time will tell) and also I got 2 for a very reasonable price.

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