Using your Tissot Chrono XL is a breeze. Simply set the time by pulling out the crown and turning it. To use the chronograph function, press the top button to start, the bottom one to stop, and then press the top again to reset. When it comes to maintenance, keep it away from extreme temperatures and magnetic fields. Clean the watch regularly with a soft, dry cloth. If you get it wet, dry it thoroughly. Remember, it's water - resistant up to 100 m / 330 ft, but avoid prolonged submersion in saltwater or hot water. If you have any issues, it's best to take it to a professional watch repair service.