This heavy-duty Casio Tide Graph timepiece WS1700H-8A, is the perfect watch for those who love the Ocean. Catch the perfect wave and delve into marine sports with this watch. Designed with a rugged looking case shape and a multi-window face the watch imitate mechanical gears and offers a cool gadget look. This watch comes packed with features and functionality which include a tide graph, moon data, 10-year battery life, and 100 meters water resistance. The perfect watch for those perfectly formed gnarly waves. - 52.5 × 48.6 × 15.2mm Case Size - 48g Weight - Resin Case, Bezel and Band - 100 Meters Water Resistant - Approx. battery life: 10 years on CR2025 - Resin Glass - World time - Dual time - Moon Data (moon age of a specific date, moon phase graph) - Tide graph (tide level for specific date and time) - Stopwatch - Timer - Multi-function alarms: 3 independent multi-function alarms (2 one-time alarms and 1 snooze/one-time alarm) *Alarm type: Daily alarm, date alarm, 1-month alarm, monthly alarm - Hourly time signal - LED backlight: Selectable illumination duration (1.5 seconds or 3 seconds), afterglow. - Calendar: Full auto-calendar (to year 2099) - Mute feature: Button operation tone on/off - Accuracy: ±30 seconds per month - 12/24-hour format - Regular timekeeping: Hour, minute, second, am/pm, month, date, day