The Casio Sports WS-1700H-1AVDF is a durable and highly functional digital watch designed for marine and outdoor enthusiasts. Its standout features include a Tide Graph that displays current tide conditions and a Moon Data feature that shows the moon's age and phase. It also boasts a long-lasting 10-year battery life, dual time, a stopwatch, and an LED backlight. With 100-meter water resistance, it is suitable for swimming and water sports. The watch's tough black resin case and comfortable resin strap ensure durability and a secure fit for any activity.