Face Diameter: 1.75"

Technical Specs:

• Multi-Band Atomic Timekeeping (US, UK).
  Receives time calibration radio signals which keep the displayed time accurate.
  Auto receive function (6 times per day).
  Manual receive function.
  Signal: US WWVB, UK MSF Frequency: US, UK 60kHz
• 50M Water Resistant.
• EL Backlight with Afterglow.
• World Time.
  29 times zones (48 cities), city code display, daylight saving auto/on/off.
• Daily Alarm.
• Countdown Timer.
  Measuring unit: 1 second.
  Countdown range: 1 second to 60 minutes.
• 1/100 second digital stopwatch.
  Measuring capacity: 59'59.99"
  Measuring modes: Elapsed time, lap time, split time, 1st-2nd place times.
• Hourly Time Signal.
• Auto Calendar (pre-programmed until the year 2099).
• 12/24 Hour Formats.
• Accuracy: /-20 seconds per month (with no signal calibration).
• Battery CR1620.
• Approx. battery life: 2 years.
• Module 3054