Using this Diesel watch is easy. Just pull out the crown to set the time and date. When you're done, push it back in gently. As for the chronograph, start it by pressing the top button, stop it with the same button, and reset it using the bottom button. To keep your watch in top shape, avoid exposing it to extreme temperatures and water for long periods. If it gets dirty, use a soft, dry cloth to wipe it clean. Don't use harsh chemicals or abrasive materials as they can damage the watch's finish. Also, have it serviced by a professional every few years to ensure its long - term performance.