The PRG550-1A1 is a 3 hand analog watch model with an LCD window.The triple sensors measure compass bearing, altitude/atmospheric pressure and temperature.The multi-purpose second hand points towards magnetic north and can indicate the latest change in atmospheric pressure or show a change in altitude from a pre-selected location, depending on the function selected. While the LCD displays numerical sensor information such as compass direction angle value, altitude, atmospheric pressure, and temperature, the PRG550-1A1’s full auto LED light activates with just a flick of the wrist and operates by Casio’s Tough Solar Power technology, allowing readings to be accomplished with ease. Casio’s Tough Solar Power technology adds to the PRG550-1A1’s efficiency by allowing the timepiece to power down when not exposed to light for a certain period of time, thus conserving energy. Black resin band analog and digital watch with black face.

• Tough Solar Power
• 100M Water Resistant
• Low Temperature Resistant (-10°C/14°F)

• Tough Solar Power
• Digital Compass
  Measures and displays direction as one of 16 points
  Measuring range: 0 to 359 degrees
  Measuring unit: 1 degree
  20 seconds continuous measurement
  Hand Indication of North
  Bidirectional calibration and Northerly calibration function
  Magnetic declination correction
• Altimeter
  Measuring range: -700 to 10,000m (-2,300 to 32,800ft)
  Measuring unit: 5m (20ft)
  Hand Indication of Altitude Differential
  Altimeter Memory (manual measurements)
  Memory capacity: 14 records
  Measurement data: altitude, date, time
  High / Low altitude memory
  Cumulative ascent / descent memory
  Reference altitude setting
  Altitude tendency graph
• Barometer
  Display range: 260 to 1,100 hPa (7.65 to 32.45 inHg)
  Display unit: 1 hPa (0.05 inHg)
  Hand Indication of Pressure Differential
  Atmospheric pressure tendency graph
• Thermometer
  Display range: -10 to 60 C (14 to 140 F)
  Display unit: 0.1 C (0.2 F)
• 100M Water Resistant
• Low Temperature Resistant (-10 C / 14 F)
• Full Auto LED Light with Afterglow
• Neo-brite Luminous Hands and Markers
• World Time
  29 times zones (29 cities + UTC), city code display, daylight saving on/off
• 5 Daily Alarms
• Hourly Time Signal
• 1/100 second stopwatch
  Measuring capacity: 59'59.99"
  Measuring modes: Elapsed time, split time, 1st-2nd place times
• Countdown Timer
  Measuring unit: 1 second
  Countdown start time setting range: 1 minute to 60 minutes (1-minute increments)
• Full Auto Calendar (pre-programmed until the year 2099)
• 12/24 Hour Formats
• Button operation tone on/off
• Accuracy: +/- 15 seconds per month
• Battery Power Indicator
• Power Saving Function
• Storage Battery: Solar Rechargeable Battery
• Approx. battery life: 6 months on full charge (without further exposure to light)
• Module 5213

Size of case/total weight
PRG550 56.8 x 49.3 x 14.2mm / 79.6g
PRG550B 56.8 x 49.3 x 14.2mm / 79.6g