Casio Protrek PRW-3500T

Casio Protrek TRIPLE SENSOR 3500T weighing in at only 128g
Triple Sensor Version 3, advanced CASIO original technology that makes it possible to pack sensors 95% smaller than those of previous models into a totally new type of compact PRO TREK. Despite their smaller size, the new sensors in this model provides improved reading accuracy and energy efficiency.
This new Triple Sensor Version 3 model delivers altitude, barometric pressure, and direction readings that are more accurate than previous models. A Barometric Pressure Tendency Alarm alerts the wearer to sudden changes in pressure readings, which can indicate upcoming weather events.
The PRW-3500T comes with a titanium band that is both lighter and provides an extra added touch of elegance.
This model is also water resistant up to 200 meters and features Full Auto LED display illumination, which makes it a great choice for wet environments and nighttime operations. A stainless steel rotary bezel can be positioned to help you keep track of your current and intended bearings.
In terms of both functions and looks, this Triple Sensor Version 3 provides a choice of outdoor timekeeping gear that can’t be beat.

Specifications :  

• Direction Bezel
• Mineral Glass
• 200-meter water resistance
• Case / bezel material: Resin / Stainless steel
• Double-lock, 1-press, 3-fold Clasp
• Titanium Band
• Solid Band
• LED backlight (Super Illuminator)
  • Full auto LED light, selectable illumination duration, afterglow
• Solar powered
• Low-temperature resistant (–10°C/14°F)
• Time calibration signal reception
• Auto receive up to six* times a day (remaining auto receives canceled as soon as one is successful)
• *5 times a day for the Chinese calibration signal
• Manual receive
• The latest signal reception results
• Time Calibration Signals
• Station name: DCF77 (Mainflingen, Germany)
• Frequency: 77.5 kHz
  • Station name: MSF (Anthorn, England)
  • Frequency: 60.0 kHz
  • Station name: WWVB (Fort Collins, United States)
  • Frequency: 60.0 kHz
  • Station name: JJY (Fukushima, Fukuoka/Saga, Japan)
  • Frequency: 40.0 kHz (Fukushima) / 60.0 kHz (Fukuoka/Saga)
  • Station name: BPC (Shangqiu City, Henan Province, China)
  • Frequency: 68.5 kHz
• Digital compass
• Measures and displays direction as one of 16 points
• Measuring range: 0 to 359°
• Measuring unit: 1°
• 60 seconds continuous measurement
• Graphic direction pointer
• Bidirectional calibration
• Magnetic declination correction
• Bearing memory
• Altimeter
• Measuring range: –700 to 10,000 m (–2,300 to 32,800 ft.)
• Measuring unit: 1 m (5 ft.)
• Manual memory measurements (up to 30 records, each including altitude, date, time)
• Auto log data (High/low altitudes, auto cumulative ascent and descent)
• Trek log data (up to 14 records of high/low altitudes, auto cumulative ascent and descent of particular treks)
• Others: Relative altitude readings (–3,000 to 3,000 m), Selectable measurement interval: 5 seconds or 2 minutes
• *1 second for first 3 minutes only
• *Changeover between meters (m) and feet (ft)
• Barometer
• Display range: 260 to 1,100 hPa (7.65 to 32.45 inHg)
• Display unit: 1 hPa (0.05 inHg)
• Atmospheric pressure tendency graph(past 42 hours of readings)
• Atmospheric pressure differential graphic
• Barometric pressure tendency information alarm (beep and arrow indicates significant changes in pressure)
• *Changeover between hPa and inHg
• Thermometer
• Display range: –10 to 60°C (14 to 140°F)
• Display unit: 0.1°C (0.2°F)
• *Changeover between Celsius (°C) and Fahrenheit (°F)
• World time
• 31 time zones (48 cities + coordinated universal time), daylight saving on/off
• Sunrise, sunset time display
• Sunrise time and sunset time for specific date, daylight pointers
• 1/10-second stopwatch
• Measuring capacity: 999:59'59.9''
• Measuring modes: Elapsed time, split time, 1st-2nd place times
• Countdown timer
• Measuring unit: 1 second
• Countdown range: 24 hours
• Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
• 5 daily alarms (with 1 snooze alarm)
• Hourly time signal
• Battery level indicator
• Power Saving (display goes blank to save power when the watch is left in the dark)
• Full auto-calendar (to year 2099)
• 12/24-hour format
• Button operation tone on/off
• Regular timekeeping: Hour, minute, second, pm, year, month, date, day
• Accuracy: ±15 seconds per month (with no signal calibration)
• Approx battery operating time:
• 7 months on rechargeable battery (operation period with normal use without exposure to light after charge)
• 23 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) 
• Size of case: 56.9 × 53.4 × 14.8 mm
• Total weight: 128 g