02-24-2010, 03:46 PM
I got one of each, auto and manual. I use the manual and put the auto on the wife cuz she can't swim. Never had the auto prematurely inflate because of gettin wet w/ spray or rain. But have jumped in with it and it goes off. Not sure just how it works but it does. I have set my manual off by accident when it got tangled in the net and pulled. I love the things and because they are comfortable to wear we actually do wear them.
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