CASIO Tide Graph and Moon Phase Graph watch Introducing the latest additions to the G-LIDE lineup of timepieces preferred by the world’s top surfers and extreme sports athletes. The GWX-8900 models feature solar-powered multi-band radio-controlled atomic timekeeping that updates automatically in areas where a time calibration signal is available. In areas where a time calibration signal is not available, you can adjust settings manually as required. All models feature Super LED light, Tide Graph, and Moon Phase Graph capabilities, which provide essential information for surfers and other extreme sports enthusiasts. Mineral Glass Shock Resistant 200-meter water resistance Case / bezel material: Resin / Aluminum Resin Band LED Backlight (Super Illuminator) Full auto LED light, selectable illumination duration, afterglow Solar powered World time 31 time zones (48 cities + coordinated universal time), city code display, daylight saving on/off Moon data (moon age of the specific date, moon phase graph) Tide graph (tide level for specific date and time) Preset tide sites: 100 (global) 1/100-second stopwatch Measuring capacity: 59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place times 2 countdown timers Can be used during interval training that alternates between two different paces. Measuring unit: 1 second Input range: 00'05" to 99'55" (1-minute increments and 5-second increments) Other: Number of repeats settable from 1 to 10 5 daily alarms (with 1 snooze alarm) Hourly time signal Battery power indicator Power Saving (display goes blank to save power when the watch is left in the dark) Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Regular timekeeping: Hour, minute, second, pm, month, day, day of the week Accuracy: ±15 seconds per month (with no signal calibration) Size of case: 55.1 X 52.5 X 16.3 mm Total weight: 71.2 g LED:White