For all of you out there that have ever wondered whether your key fob was waterproof but were afraid to test it, fret not. I have performed the testing for you. It is waterproof! I wore my swim trunks to the pool yesterday and forgot that I put the key fob in my pocket. I was in the pool and hot tub for two straight hours before I realized my mistake. It's either waterproof or I'm extremely lucky because the thing still worked. I opened the battery panel and found a dry battery and pc board. Holy crap, not a drop of water inside the case.