Casio Men's Pro Trek PRW2500T Tough Solar Digital Watch Tough Solar Power, Multi-Band Atomic Timekeeping, 200M Water Resistant, Duplex LC Display, Tide Graph (tide level for specific date and time), Moon Data (moon age of the specific date and moon phase graph) Digital Compass, Altimeter, Altimeter Memeory, Barometer, Thermometer Full Auto EL Backlight with Afterglow, 5 Independent Daily alarms, Hourly time signal, World Time, 1/100 second stopwatch Countdown Timer, Battery level indicator, Power saving function, Full auto-calendar (pre-programmed until the year 2099), 12/24 hour formats, Button operation tone on/off, Storage Battery: Solar rechargeable battery, Approx. battery life: 5 months on full charge (without further exposure to light), 23 months on full charge with Power Saving Function (without further exposure to light), Module: 3258