This is the Casio Tide Graph Blue Men's Watch WS1300H 2A. The Casio Tide Graph Blue Men's Watch WS1300H 2A starts with a durable black resin exterior design, 100 meter water resistance, and 10 year battery life. Then add on board tide graph, moon data, and LED light ensuring an easy read even in the dark, to deliver everything a water sports enthusiast needs, right at your fingertips.