Using this Seiko Prospex watch is a breeze. Just put it on your wrist with the black silicone strap. The one - way rotating bezel can be turned counter - clockwise to track elapsed time. You can wind it manually if you want to keep it running. When it comes to maintenance, keep it away from strong magnetic fields as they can affect its accuracy. Clean the case and strap with a soft, dry cloth regularly. If you plan to swim or dive with it, make sure the crown is properly screwed down to keep water out. And remember, the power reserve of about 70 hours means you don't have to worry about it stopping working too soon, but if you're not wearing it for a long time, give it a quick wind before using it again.