To use this Tag Heuer Carrera watch, simply set the time and date using the crown on the side of the case. When adjusting, pull the crown out gently to the appropriate position. Wearing it is easy, just fasten the folding clasp. For maintenance, keep it away from magnetic fields as they can affect the movement. Wipe the watch regularly with a soft, dry cloth to keep it clean and shiny. Avoid exposing it to extreme temperatures or water unless it's specifically water - resistant. If you have any problems or need a battery change (although it's automatic, in some cases), take it to an authorized Tag Heuer service center.