Using your G - Shock watch is easy. Just slip it on your wrist and start using the analog and digital functions. To set the time, refer to the instruction manual that comes with the watch. When it comes to wearing, this watch is suitable for all - day use and can be paired with different outfits. It's water - resistant up to 200 meters, so you can wear it while swimming or doing water sports, but avoid deep - sea diving. For battery replacement, after about 3 years, take it to a professional watch repairer to replace the SR726W batteries. To keep your watch looking good, clean it regularly with a soft, dry cloth. Avoid exposing it to extreme temperatures and harsh chemicals, as this may damage the resin band and the watch case.