Does not work! I took it to a professional watch repair guy to insert the battery that it came with, since I had no tools that would allow me to put the battery in...There was actually a battery already in the watch when he opened it up, but he told me it was an old one. When he put in the new one the watch just simply did not work! It was so frustrating because it was for my daughters birthday present and she was so upset that we had to return it. Don't waste your time and money on this. I should've listened to other reviews.