What does 100 meter (10 ATM) waterproof mean and who came up with this?
water proof

What does 100 meter (10 ATM) waterproof mean and who came up with this?

You probably see "30 meters waterproof" in the details of a smartwatch and think that means you can dive up to 30 meters deep with it. Unfortunately, that is not the case! What does a water resist...