Using your G - Shock GA - 700 Hidden Glow Series watch is a breeze. Just press the front buttons to access different functions. To set the time and date, follow the simple instructions in the manual. When it comes to water resistance, it can handle up to 200 meters, so you can wear it while swimming or snorkeling. But avoid deep - sea diving as it might be too much pressure. For battery life, you can expect about 5 years on a CR2016 battery. When the time comes to change the battery, it's best to take it to a professional. To keep your watch looking great, clean it regularly with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials as they can damage the resin case, bezel, and band. With proper care, your G - Shock watch will serve you well for a long time.