The G-Shock Frogman series is Casio's line of rugged diving watches. This version features a digital display, with solar charging and atomic time keeping.

Full Specs and Features

Multi-Band Atomic Timekeeping (US, UK, Germany, Japan, China)
Receives time calibration radio signals which keep the displayed time accurate
Auto receive function up to 6 times per day (up to 5 times per day for China)
Manual receive function
Signal: US WWVB, UK MSF, Germany DCF77, Japan JJY40/JJY60, China BPC
Frequency: US 60kHz, UK 60kHz, Germany 77.5kHz, Japan 40/60kHz, China BPC 68.5kHz
Tough Solar Power
Shock Resistant
ISO 200M Water Resistant
Full Auto EL Backlight with Afterglow
World Time
31 times zones (48 cities UTC), city code display, daylight saving on/off
Moon Data (moon age of the specific data, moon phase graph)
Tide Graph (tide level for specific date and time)
Dive time and surface interval measurement function
Dive time: 1 second increments, up to 23:59'59
Surface interval: 1 minute increments, up to 47:59'59
Memory capacity: One set of data (dive time, dive start time and surface interval)
1/100 second stopwatch
Measuring capacity: 23:59'59.99"
Measuring modes: Elapsed time, split time, 1st-2nd place times
Countdown timer
Measuring unit: 1 second
Input range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
4 Daily alarms and 1 Snooze Alarm
Hourly time signal
Battery power indicator
Power saving function
Button Operation Tone on/off
Full auto-calendar (pre-programmed until the year 2099)
12/24 hour formats
Accuracy: /- 15 seconds per month
Storage battery: Solar rechargeable battery
Approx. battery life: 8 months on full charge (without further exposure to light)