Using your G-Shock GM5600G-9 Gold Men’s Watch is a breeze. To set the time, look for the buttons on the side of the watch. Press them according to the instructions in the manual to adjust the hours, minutes, and date. The alarm function is handy for waking you up or reminding you of important events. Just set the time you want the alarm to go off, and you're good to go. The stopwatch and timer are great for timing activities. When it comes to the backlight, press the designated button, and it'll light up the display in low-light conditions. As for maintenance, keep it away from extreme heat or cold. If it gets wet, dry it with a soft cloth. The battery lasts about 2 years, but when it starts to run low, have it replaced by a professional. And since it's water-resistant up to 200 meters, you can wear it while swimming, but avoid high-pressure water activities like diving with scuba gear. Enjoy your stylish and reliable G-Shock watch!