Using this Diesel Mega Chief Chronograph is easy. Just pull out the crown to set the time and date. You can also use the chronograph functions by pressing the buttons on the side of the watch. When wearing, avoid hitting it against hard objects to prevent scratches on the stainless - steel case and strap. To keep it looking its best, clean the watch regularly with a soft, dry cloth. If you get it wet, dry it thoroughly right away. Don't expose it to extreme temperatures or chemicals as this can damage the watch.