Casio Waveceptor Digital Watch GW7000BDJ-2V Atomic Timekeeping, 200M Water Resistant, EL Backlight with Afterglow, Tough Solar Power . World Time, 4 Daily Alarms &amp; 1 Snooze Alarm, Time Recorder,1/100 second stopwatch Hourly Time Signal, Auto Calendar (pre-programmed until the year 2099),12/24 Hour Formats, Accuracy: 15 seconds per month (with no signal calibration) Storage Battery CTL1616, Battery Power Indicator, Power Saving Function Approx. battery life: 11 months on full charge (without further exposure to light), Module 2818