To use this Diesel DZ4582 Mega Chief watch, simply adjust the strap to fit your wrist. Set the time by pulling out the crown and turning it. Remember to handle it gently as it's a delicate item. When it comes to maintenance, clean it with a soft, dry cloth regularly to keep it looking good. Avoid exposing it to extreme temperatures or moisture. And if you have any issues, take it to a professional watch repairer.