Casio 
G-Shock

GWF1000-1

A new species of FROGMAN has surfaced and this one is more powerful than ever. While its predecessor utilized Solar Power and Dive Timer as its backbone; Atomic Timekeeping and Tide & Moon Graphs have now been added for Non-Stop, Self-Adjusting performance. Whether journeying underwater or on land, this amphibious masterpiece can take you there.

• 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)
• Module: 3184

• Band Type:  Resin
• Color:  Black
• Dial Code:  Digital