To use this watch, start by setting the time and date. The chronograph function can be used to time events - press the top button to start, the middle one to stop, and the bottom one to reset. When it comes to maintenance, keep it away from water as much as possible, although it has some water - resistance. Wipe it gently with a soft cloth regularly to keep it clean. Avoid knocking it against hard objects to prevent damage. If the watch stops working, it might need a new battery, and you can have it replaced by a professional.