Using your Tissot watch is easy. Just set the time and date according to the instructions in the manual. To use the chronograph function, press the buttons on the side of the watch. When you're done, press them again to stop and reset. For water - resistance, it can handle normal activities like swimming in shallow water, but don't use it for deep - sea diving. When it comes to maintenance, keep it away from magnetic fields and extreme temperatures. Clean the watch regularly with a soft, dry cloth to keep it looking good. If there are any problems, take it to an authorized Tissot service center.