A:AnswerYes, my daughters take theirs in the shower with them. They also take it to the pool. It has been submerged and sprinkled on and still works fine.
A:AnswerThe battery has lasted me about 4-6 hours at full volume. It's not a big speaker but we have used it at the pool and backyard parties with no complaints. I would say probably about twenty to thirty feet. Dynamic sound from a small package.
A:AnswerFor the mid-sized water, resistant products the sound is great, with great bass. A full sized unit may be better but would be much less portable. This could easily be hidden in a locker.
A:AnswerYes, definitely. I just Bluetooth my UE Wonderboom to the Dot in my kitchen and the sound is so much better than the more expensive mini Bluetooth speaker I had in there before. The sound is louder and clearer...just what I wanted. You won't be disappointed.
A:AnswerIt charges with the same connections most phones use. So, if you have a car charger, it should work fine.
It is compact, around 4"x 2"x1". This is approximate.