Using your Tag Heuer Autavia watch is a breeze. To start the chronograph, simply press the top button. Press it again to stop, and the bottom button to reset. For the fly - back function, it allows you to quickly reset and restart the chronograph in one motion. When it comes to wearing, make sure the pin buckle is securely fastened to keep the watch in place. As for maintenance, keep the watch away from extreme temperatures and moisture. You can clean the case with a soft, dry cloth regularly. Avoid exposing the watch to strong magnetic fields as it may affect the movement. And remember to have it serviced by a professional every few years to keep it running smoothly.