Using this Seiko Prospex watch is easy. Just wind it manually if you want to top up the power reserve, especially if you haven't worn it for a while. When wearing it, make sure the strap fits comfortably around your wrist. As for water resistance, it can handle swimming and snorkeling up to 200 meters, but avoid high - pressure water situations like deep - sea diving. To keep it in top shape, clean the case and strap regularly with a soft cloth. Store it in a dry place when not in use to prevent damage from moisture. And if you need to adjust the time, use the crown carefully to set the right time and date.