DESC: Multi-Band Atomic Timekeeping (US, UK, Germany, Japan), Tough Solar Power, 200M Water Resistant, Tide Graph (based on a combination of preset and user input data) Moon Data (moon age based on current date or user input data, moon phase graph), Digital Compass, Bearing Memory, Altimeter, Altimeter Memory Barometer, Thermometer, Low Temperature Resistant (-10 C / 14 F), Full Auto EL Backlight with Afterglow, World Time, 5 Daily Alarms, Countdown (Yacht) Timer 1/100 second stopwatch, Hourly Time Signal, Auto Calendar (pre-programmed until the year 2099), 12/24 Hour Formats, Button operation tone on/off Accuracy: +/-20 seconds per month (with no signal calibration), Storage Battery CTL1616,Battery Power Indicator, Power Saving Function, Module 3134, Size of case/total weight: 56.2 x 50.6 x 13.9mm / 79g