Thanks guys for the help. I wish there were instructions w/ it. O well I have no Idea what the push button does at the bottom. Yes I am a car guy, that is my car 2003 Saleen Cobra (My baby). I got the watch from Trusty. Fast shipping. I am having a minor problem though. I was messing with the big "Dial" (Haha) around the watch that moves. I think that is used to tell how much air is left in oxygen tanks for diving. But it is coming loose. Is there a way to tighten it up?