Using your Tissot T-Race Chronograph is easy. To start or stop the chronograph function, just press the buttons on the side of the watch. The watch is water-resistant up to 100 meters, but it's best not to swim with it in hot tubs or saunas as the extreme temperatures can affect its performance. When it comes to maintenance, keep it away from magnetic fields as they can disrupt the movement. You can clean the watch with a soft, dry cloth. If the watch stops working, it might be time to replace the battery. You can take it to a professional watch repair shop for battery replacement.