As an upgrade to it's predecessors, the new GWM500 add the ability to connect with the radio transmitter to update the watch's time & date.

Connecting the watch to the radio transmitted adds an additional 18 cities to the world time mode, for a total of 48-cities. The watchs' time memo function has been replaced with a countdown timer.

• Multi-Band 6 Atomic Timekeeping
• 48-City World Time
• Countdown Timer
• Band Type:  Resin
• Color:  Black
• Dial Code:  Digital

Technical Specs:

• 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
• 200M Water Resistant
• Full Auto EL Backlight with Afterglow
• World Time
  • 31 times zones (48 cities + UTC), city code display, daylight saving on/off
• 4 Daily alarms and 1 Snooze Alarm
• Hourly time signal
• 1/100 second stopwatch
  • Measuring capacity: 23:59'59.99" 
  • Measuring mode: Elapsed time, split time, 1st-2nd place times
• Countdown Timer
  • Input range: 1 minute to 24 hours (1-minute incremants and 1-hour increments)
• Full auto-calendar (pre-programmed until the year 2099)
• 12/24 hour formats
• Button operation tone on/off
• Accuracy: +/- 15 seconds per month (with no signal calibration)
• Battery power indicator
• Power saving function
• Storage battery: Solar rechargeable battery
• Approx. battery life: 9 months on full charge (without further exposure to light)
• Module: 3405

Size of case / total weight
GWM500A 56.8 x 46.0 x 16.6mm / 140g
GWM530A 56.8 x 46.0 x 16.6mm / 140g