Designed for water - sport lovers, the Casio WS1300H - 2A all - blue resin digital watch is a great choice for ocean adventures. Its all - resin exterior offers 100 - metre water resistance, allowing you to submerge it safely in water. It also has an impressive 10 - year battery life. The watch features a prominent digital time display, along with a tide - graph reading monitor, moon data, and an LED light for illumination in the dark. True to Casio's style, it comes with a stopwatch, timer, and alarm.

Using this Casio WS1300H - 2A watch is easy. To check the time, just look at the clear digital display. The tide - graph monitor can show you useful tide information, and you can view moon data too. The LED light can be turned on when it's dark, usually by pressing a specific button. The stopwatch can be used to time short events, and the timer can help you set a specific time limit. The alarm can wake you up or remind you of something. When using it in water, make sure the seals are in good condition. Don't press the buttons underwater to avoid water getting inside. For maintenance, keep it clean with a soft, dry cloth. If it gets dirty, you can gently wipe it with a damp cloth, but don't soak it for too long. Store it in a dry place when not in use.