Using your Tag Heuer Carrera watch is easy. Just set the time and date as you would with any other watch. To use the chronograph function, press the top button to start, the bottom button to stop, and the top button again to reset. When it comes to maintenance, keep your watch clean by wiping it gently with a soft cloth regularly. Avoid exposing it to extreme temperatures or moisture. If you're going swimming or diving, make sure the watch is water - resistant to the appropriate depth. And don't forget to have it serviced by a professional every few years to keep it running smoothly.