---
product_id: 1930865
title: "Casio G-Shock GDF-100-1B Twin Sensor Watch"
brand: "g-shock"
price: "$6.97"
currency: USD
in_stock: false
reviews_count: 10
url: https://www.desertcart.us/products/1930865-casio-g-shock-gdf-100-1b-twin-sensor-watch
store_origin: US
region: United States of America
---

# World Time Water Resistant Twin Sensor Casio G-Shock GDF-100-1B Twin Sensor Watch

**Brand:** g-shock
**Price:** $6.97
**Availability:** ❌ Out of Stock

## Summary

> ⏱️ Gear Up for Adventure with G-Shock!

## Quick Answers

- **What is this?** Casio G-Shock GDF-100-1B Twin Sensor Watch by g-shock
- **How much does it cost?** $6.97 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/1930865-casio-g-shock-gdf-100-1b-twin-sensor-watch)

## Best For

- g-shock enthusiasts

## Why This Product

- Trusted g-shock brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Alerts:** Multi-function alarm and countdown timer to keep you on track.
- • **Adventure Ready:** Equipped with altimeter, barometer, and thermometer for outdoor enthusiasts.
- • **Diving Companion:** Water resistant up to 660 feet, perfect for recreational scuba diving.
- • **Global Connectivity:** World time feature covering 31 time zones and 48 cities.
- • **Unmatched Durability:** Shock-resistant black resin case and strap for ultimate protection.

## Overview

The Casio G-Shock GDF-100-1B Twin Sensor Watch is a rugged digital dive watch designed for the adventurous spirit. With its shock-resistant black resin case, advanced twin sensor technology, and impressive water resistance of up to 660 feet, this watch is perfect for both everyday wear and extreme outdoor activities. Stay connected globally with its world time feature and never miss a beat with its multi-function alarms.

## Description

.com          Set a course for adventure every day you wear the Twin Sensor Multi-Function Watch, which includes a built-in altimeter, barometer, and thermometer. G-Shock are the toughest watches on the planet. Other features include an LED light (high brightness), flash alert, world time (31 time zone and 48 cities), multi-function alarm, 1/100th second stopwatch, countdown timer, 12/24 hour formats and mute function. This large, round watch features a black resin case with orange accents and a comfortable resin strap. Scratch-resistant mineral crystal and water resistance to 200 meters (660 feet).             Brand Story          CasioWith the launch of its first watch in November 1974, Casio entered the wristwatch market at a time when the watch industry had just discovered digital technology. As a company with cutting-edge electronic technology developed for pocket calculators, Casio entered this field confident that it could develop timepieces that would lead the market.Today, Casio is focusing its efforts on solar-powered radio-controlled watches: the built-in solar battery eliminates the nuisance of replacing batteries, atomic timekeeping means the users never have to reset the time. Recently, Casio launched a series of Bluetooth watches that sync to the users cell phone to automatically update the time. Casio is always moving time forward.

## Features

- Shock resistant black resin case and strap with buckle closure
- Twin sensor (altimeter/barometer/thermeter); LED light; flash alert
- World time (31 time zones/ 48 cities); Multi function alarm
- Countdown timer; 12/24 hour formats; Mute function
- Water resistant to 660 feet (200 M): suitable for recreational scuba diving

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Package Dimensions L x W x H | 4.3 x 3.9 x 3.8 inches |
| Package Weight | 9.6 Ounces |
| Item Dimensions  LxWxH | 0.59 x 0.59 x 0.59 inches |
| Item Weight | 0.4 Pounds |
| Brand Name | Casio |
| Model Name | GDF100-1B |
| Color | Black |
| Material | resin |
| Suggested Users | mens |
| Manufacturer | Casio |
| Part Number | GDF100-1B |
| Model Year | 2011 |
| Style | Digital,Dive Watch |
| Sport Type | Diving |
| Water Resistance Depth | 660 Feet |

## Images

![Casio G-Shock GDF-100-1B Twin Sensor Watch - Image 1](https://m.media-amazon.com/images/I/61V+wmVs47L.jpg)
![Casio G-Shock GDF-100-1B Twin Sensor Watch - Image 2](https://m.media-amazon.com/images/I/61uSqTPdzHL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Great Watch
  

*by S***E on Reviewed in the United States on August 8, 2011*

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).

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Nice watch; Built like a G-Shock
  

*by J***T on Reviewed in the United States on June 3, 2012*

Bought this for my son as a 14th birthday present at his request after much research on his part.  I've had my original Cascio G-Shock since 1987, took it on all of my Airborne Infantry parachute and helicast ops, and been snorkelling with it, so he wanted one of his own.  It is somewhat large - any bigger and he couldn't strap it on - but looks great and he loves it.  The features are great with the following caveats:  The face is intentionally "tactical".  You cannot see the numbers unless in direct/day light.  The backlight feature is very nice, though, and you can set how long it stays on.  The temperature reads quite a bit high because the sensor is next to the skin (around 10 degrees high for my son), but is accurate if placed away from the body for a few minutes.  Still testing the altimeter.  We are going to Mexico soon, so we will test the multi-city time.The package came on time from the vendor without issue.  The Amazon guarantee gave me the confidence to buy from an unknown seller.

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Great look and feel, wears like a champ!
  

*by S***N on Reviewed in the United States on January 30, 2014*

As someone who regularly ventures into the wild outdoors, I needed a watch that would both durable and functional. This watch easily fulfills both needs. Out of the box, the sensors needed minimal calibration (which takes about 10 minutes). Like others have mentioned, the temperature readings will generally always be a little off while the watch is being worn. This is pretty unavoidable due to the timepiece's close proximity to the warmth that the human body gives off. Take the watch off your wrist for a couple minutes, and it seems to always be accurate within about 2 degrees. The included instruction manual reflects the same instruction.Despite the large size, the watch wears very well. It is not overly heavy, and the band is strong, while giving enough flexibility to to remain comfortable throughout the day. The finish to the band and bezel is a nice matte black that seems to resist scratches and dirt. The face is black with orange-red accents and numerical display. While it is not nearly as easily read in dark situations as the standard grey face/black lettering, it is really not that bad. I find that I can read it fairly easily in low light situations without resorting to using the light. As for the light itself, it is a bright blue that beautifully illuminates the watch face. The time the light remains on can be adjusted by the user (between 1 and 3 seconds), and is the perfect balance of making the text clear as day without being distractingly bright. The overall bulk of the watch is very manageable. It is worth noting that due to the thickness of the face, it can be awkward when wearing a shirt with tighter-fitting sleeves. However, this should be looked at as a timepiece for active people that can benefit from the durability. It is clearly not a dress watch, but that really should go without saying. Just for reference, I'm about 6'3", 200#, and fairly solid frame. The watch does not look huge on me, but rather quite fitting of someone my size.Pros:Great build quality and materials usedAccurate sensorsLightweight and strong, great for active lifestyles.Perfect level of illumination.Cons:Black face/orange lettering can occasionally be tough to read in the dark without using the light.Watch face is very thick, making it difficult to wear with shirts having tight fitting sleeves.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-03*