Using your TAG Heuer Formula 1 watch is a breeze. To operate the chronograph, just use the buttons on the side of the watch. Press the top button to start and stop the timer, and the bottom one to reset it. When it comes to wearing, fasten the folding clasp securely on your wrist. As for water resistance, it can handle swimming and snorkeling up to 200m, but avoid high - pressure water like jet - skiing or scuba - diving. For maintenance, keep your watch clean by wiping it gently with a soft, dry cloth regularly. Avoid exposing it to extreme temperatures and chemicals. If you need to replace the battery, it's best to take it to a professional watchmaker to ensure proper installation and to keep your warranty valid.