G-Shock GDF-100-1B Twin Sensor Watch

Product Review

Product Features

• New design, Black resin band, Digital watch with black face, Front-Facing Twin Sensor Design (Altimeter/Barometer & Thermometer) , Super Illuminator LED , 48-City World Time, Measuring unit: 1 second, , 12/24 Hour Formats
• Shock Resistant, 200M Water Resistant, LED Backlight (Super Illuminator), Measuring range: -700 to 10,000m (-2,300 to 32,800ft) without reference altitude, Measuring unit: 5m (20ft), Full Auto Calendar (pre-programmed until the year 2099)
• Others: Reference altitude setting, Display range: 260 to 1,100 hPa (7.65 to 32.45 inHg), Display unit: 1 hPa (0.05 inHg), Atmospheric pressure differential pointer, Countdown range: 1 minute to 24 hours (1 hour increments and 1 minute increments)
• Display range: -10 to 60 C (14 to 140 F), Display unit: 0.1 C (0.2 F), World Time, 31 times zones (48 cities), city code display, daylight saving on/off, Button tone operation on/off, Accuracy: +/-15 seconds per month (with no signal calibration)
• 5 Daily Alarms, Hourly Time Signal, 1/100 second stopwatch, Measuring capacity: 23:59'59.99", Measuring modes: Elapsed time, split time, 1st-2nd place times, Countdown Timer, Battery: CR2025, Approx. battery life: 5 years

Customer Reviews

 (10 customer reviews)

8 of 8 people found the following review helpful

Great Watch, August 8, 2011

steve - See all my reviews

Amazon Verified Purchase(What's this?)

This review is from: Casio Men's GDF100-1B G-Shock Twin Sensor Multi-Functional Black Resin Digital Sport Watch (Watch)

I have had many high speed watches in my day but this one is one of my favorites! Rugged, easy to use and just a great watch for anyone who works outdoors. Very accurate (you must know how to use a baromoter and understand that the temp will be higher than the actual temp when the watch is on your arm) and user friendly. The led light is BRIGHT! All in all, I really like this watch even when compared to my Suunto MI X9 ($500 watch).

4 of 4 people found the following review helpful

Great Watch - Measuring Temp on Wrist, December 20, 2011

George Kibby (Lower DE) - See all my reviews
  

Amazon Verified Purchase(What's this?)

This review is from: G-Shock GDF-100-1B Twin Sensor Watch (Misc.)

The watch arrived today and it is everything I wanted - a different appearing timepiece that measures barometric pressure and temperature on my wrist. The watch can be calibrated for a nearly accurate temperature measurement (it will vary slightly with your body temperature). Wear the watch for 30 minutes to an hour. Then follow the temperature calibration instructions (E-26) with the watch still on your wrist. This measurement is accurate enough for me. I also enjoy the barometric pressure monitoring function as a drop in the pressure really bothers my joints and a little warning of a drop allows me to plan my day. I would recommend this watch to anyone who is looking for a different timepiece with temperature and barometric pressure readings.

2 of 2 people found the following review helpful

Best cost performance, October 5, 2011

Hiko - See all my reviews

Amazon Verified Purchase(What's this?)

This review is from: Casio Men's GDF100-1B G-Shock Twin Sensor Multi-Functional Black Resin Digital Sport Watch (Watch)

Thanks to strong Japanese YEN, it was cheaper than purchasing in Japan. There are some similar watches from CASIO, but it is the best one in terms of size, design, function and price. The only drawback is that it is a bit hard to see characters even in daytime due to the recess position of LCD and the low contrast of characters.