Using your G - Shock G - Steel watch is easy. Simply set the time according to the instructions in the manual. To keep it in top shape, avoid exposing it to extreme temperatures and chemicals. If it gets dirty, you can clean it with a soft, damp cloth. Since it has 200 - meter water resistance, you can wear it while swimming or snorkeling, but don't press the buttons underwater. Replace the battery every two years as it uses a CR2016 battery to ensure accurate timekeeping.