Using this Diesel DZ4566 watch is easy. To use the chronograph stopwatch, simply press the buttons on the side of the watch. Start and stop your timing as you need. For normal timekeeping, it'll work just like any other watch. When it comes to care, keep it away from strong magnetic fields as they can affect its accuracy. Don't expose it to extremely high or low temperatures either. To clean the watch, use a soft, dry cloth to wipe the case and bracelet. Since it's water - resistant to 100m, it can handle splashes and short swims, but avoid long - term submersion in water, especially in saltwater, as it may cause corrosion. If the battery runs out, take it to a professional watch repair shop to replace it.