And it has to be waterproof (not just watr resistant), because condensing steam or water vapor will destroy it quickly if it isn't. Unless you put it into a zipped plastic bag - which is what you should do with your phone if it's going to be near water, water vapor or steam. (On a boat trip, people thought I was crazy to carry my "waterproof" marine radio in double plastic bags - until it fell overboard in about 50 meters of ocean water, floated, and I calmly reached over with a net and retrieved it. Then everyone wanted to know where to buy "those" bags. [I could have gotten rich selling 5 cent bags for 10 dollars each.] Oh - the radio was still working after I hosed the salt water off the outer bag, it never shut off.)