A:AnswerThe watch is indeed water resistant up to 50 meters in depth. So, one theoretically should be able to wear it while swimming, showering (although I don't know why one would), hand washing, and other water-related activities. There is a feature that allows the speakers to emit a sound frequency that pushes water out of the speaker.
A:AnswerI am a Mom and purchased the 38 and it is plenty big enough for my needs. I like the fact that is still looks like a regular watch and you can change bands out. Great for a woman.
A:AnswerIt works by Bluetooth/internet service through your phone. It will only pick up your phone messages etc if your phone is close enough or hooked up through the internet
A:AnswerCheck through the packaging! The charger is rather innocuous looking - white disc the size of a quarter with a USB cable attached. If you didn't get it, ask your friend where the watch was purchased. Anew charger is probably $19 - seems like all Apple chargers are $19.