Best $20 I spent for my cruise! it's waterproof and solar powered, I didn't have to worry about getting it wet at the beach or doing any water sports, also love the fact that while in the pool, I can tell what time it is to get out and get ready for dinner or shows. Also because we have to keep the ship's time while at the ports, we know exactly when we have to get back instead of trying to figure what the the local time is vs ship time.