Using this Casio G - Shock watch is a breeze. Just set the time and date according to your needs. Since it's shock - resistant, you don't have to worry too much about minor bumps, but try to avoid dropping it from a great height. The 200 - meter water resistance means you can wear it while swimming, but don't use it for scuba diving. When it comes to maintenance, keep it clean by wiping it with a soft, dry cloth regularly. If the battery runs out after about 3 years, take it to a professional to replace the CR1025 battery to ensure proper installation.