Casio PRW-S3100-1DR Protrek Watch

PRO TREK has once again launched the latest radio wave model - PRW-S3100, which is proud of the third generation of the three sensors of PRO TREK, which can measure important information such as temperature, pressure/height and orientation more quickly and accurately. The local wave function and TOUGH SOLAR solar power technology can keep track of time and important information even in harsh outdoor environments. The PRW-S3100 features a sapphire crystal glass mirror with a stainless steel bezel and a carbon fiber finish on the back of the resin strap for a significant increase in the life of the strap. It also has many functions such as waterproof 100 meters, world time, 1/10 second countdown and so on.

• Case / Bezel Material: Resin / Stainless Steel 
• Carbon fiber strap
• Sapphire glass surface
• Black ion IP processing
• Solar power
• Waterproof 100 meters
• Automatic high-brightness LED lighting (optional lighting time)
• Low temperature resistant device (-10°C/14°F)
• Radio wave receiving function: automatic signal receiving (up to 6 times per day, no longer received after receiving success; 
• receiving signals from China, receiving 5 times a day) / manual signal receiving 
• China> receiving radio wave: BPC, frequency: 68.5kHz 
• Japan >Receiving radio wave: JJY, frequency: 40kHz/60kHz (corresponding models of Fukushima/Kyushu two launchers) 
• <North America> Received radio wave: WWVB, frequency: 60kHz 
• European region> Received radio wave: MSF/DCF77, frequency: 60kHz/ 77.5kHz
• Digital Compass: 
• 16-Azimuth Measurement and Display 
• Measurement Range: 0°~ 359° 
• Unit of Measurement: 1° 
• Continuous Measurement (60-second continuous automatic detection) 
• Direction indication 
• Bidirectional correction and north correction 
• geomagnetic declination correction 
• memory elimination
• Height measurement 
• range: -700~10,000m (-2,300~32,800ft.) 
• Unit: 1m (5 ft.) 
• Manual memory measurement (up to 30 strokes, each containing height, date and time) 
• Automatic memory measurement (including maximum/minimum Height, cumulative increase/cumulative drop height) 
• Road log value (up to 14 strokes, each containing maximum/minimum height, cumulative increase/accumulated drop height, date and time) 
• Other: relative height (-3,000~3,000m) 
• selection Measurement spacing: 5 seconds or 2 minutes 
• 1 second only in the first 3 minutes of measurement 
• meter (m) and inch (ft.) switching
• Air pressure measurement 
• range: 260~1,100 hPa (7.65~32.45 inHg) 
• Unit: 1 hPa (0.05 inHg) Air　
• pressure trend graph (past 42 hours) 
• Air pressure difference map 
• Instant climate change warning 
• *hPa and inHg switching
• Temperature measurement 
• range: -10~60°C (14~140 °F) 
• Unit: 0.1°C (0.2°F) 
• °C and °F switching
• World Time 
• 31 Time Zone (48 cities + global corresponding time), city code display, daylight saving time (on/off)
• Sunrise/sunset time indication
• 1/10 second code meter 
• measurement range: 999:59’59.9″ 
• measurement mode: elapsed time, halfway time, first and second time difference
• Countdown 
• measurement unit: 1 second 
• measurement range: 24 hours 
• start time setting range: 1 minute ~ 24 hours (unit: 1 second / 1 hour)
• 5 independent alarms (including a group of snooze alarms)
• report punctually
• Power indicator
• Power saving function (when entering dark state, the watch will automatically turn off the screen display)
• Fully automatic calendar (~2099)
• 12/24 hour switching
• Operation sound (on/off)
• Time mode: hour, minute, second, PM, year, month, date, week
• Accuracy: ±15 seconds per month (normal quartz accuracy when no radio waves are received)
• Estimated battery life: 
• In the case of solar cells not generating electricity, continuous operation after full cha