Using your G-Shock GA-B001 watch is a breeze. First, pair it with your smartphone via Bluetooth®. Open the dedicated app on your phone, and you'll have access to all the functions easily. When it comes to wearing the watch, adjust the resin band to a comfortable fit. To keep it in top shape, avoid exposing it to extreme temperatures or chemicals. If it gets dirty, you can gently clean it with a soft cloth and mild soap. Remember, it has 200-meter water resistance, so you can wear it while swimming or doing water sports, but don't press the buttons underwater. The battery lasts about 2 years, and when it's time to replace it, take it to a professional watch repair shop to ensure proper installation.