Using your Citizen Eco-Drive EM1103-86Y is easy. Just put it on your wrist and adjust the push-button buckle for a snug fit. The watch is powered by light, so make sure to expose it to natural or artificial light regularly to keep it running. You don't need to worry about changing batteries often because it has a 6 - month power reserve. When it comes to water resistance, it can handle splashes and brief immersions in water up to 50 meters, but don't wear it for diving or long - term underwater activities. To keep your watch looking great, clean it gently with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials. Also, store it in a cool, dry place when you're not wearing it. This will help maintain its accuracy and beauty for years to come.