Technical Specifications

Bluetooth® Smart
The watch is equipped with energy-saving Bluetooth® technology, which offers power-saving data transfer at the push of a button. The watch can connect to a smartphone wirelessly via Bluetooth®, enabling access to a wide range of useful functions.
Smartphone time
Local time will automatically be adjusted whenever the watch is connected with a smartphone.
Auto LED light
A light-emitting diode (LED) is used to illuminate the watch face, incl. the feature of an Auto Light Switch that illuminates the display when the watch is angled towards the face.
Mud-resistant case
Dirt- and mud-resistant construction keeps mud and dirt from getting into the watch.
Shock-resistant
Shock-resistant construction protects against impact and vibration.
Neo-display
A luminous coating provides long-term illumination in the dark after only a short exposure to light.
Digital-compass
A built-in direction sensor detecs the magnetic north.
10,000 m Altimeter
A pressure sensor detects changes in the air pressure and converts the result into an altitude up to 10,000 m.
Altimeter data memory
Depending on the model, up to 40 sets of elevation data can be stored in the watch's data memory and re-accessed at any time. Each of these data sets consists of a measured altitude as well as the date and time. In addition to the individual altitudes, the maximum and minimum altitudes during a measurement are also stored.
Height Gain
The height gain sums all the meters you have climbed in a session, so that you can see at a glance the total ascent on a tour.
Barometer (260 / 1.100 hPa)
A special sensor measures the air pressure (measuring range: 260 / 1100 hPa) and presents this on the display in the form of a symbol. This enables early detection of weather trends.
Thermometer (-10°C / +60°C)
A sensor measures the ambient temperature around the watch and displays it in °C (-10°C /+60°C).
Steptracker
The watch has a built-in 3-axis accelerometer that counts the steps you take and indicates the numbers on the display.
Sunrise/sunset display
After entering the geographical location, sunrise and sunset times can be displayed for any given date.
Location Indicator
The location indicator indicates the direction and distance of a previously stored location. This function can be very useful, if you got lost and you want to get back to a cabin, a lake or a car.
Mission Log
After activating the Mission Log function, route and altitude profile are stored in the smartphone and can be displayed on a map. In addition, photos are automatically stored in a Mission Log when they are made during a tour storage.
World time function
Displays the current time in major cities and specific areas around the world.
Stopwatch function - 1/100 sec. - 24 hours
Elapsed time, split time and final time are measured with 1/100-sec accuracy. The watch can measure times of up to 24 hours.
Timer - 1/1 min. - 24 hours
For fans of precision: the countdown timers help you to remember specific or recurring events by giving off an audible signal at a preset time. The time can be set to the nearest minute and up to 24 hours in advance. Ideal for people who need to take medicines every day or those who do interval training.
5 daily alarms
The daily alarm reminds you about recurring events with an acoustic signal at the time you have set. This model has 5 independent alarms for flexible reminders of important appointments.
Button tones on/off
The button tones for using the mode button can be turned off. This means that the watch no longer beeps when switching from one function to another. Preset alarm or countdown timers remain active when the button tones are deactivated.
Hand Moving Function
With a push of a button, hands are moving and permit a free visibility of functions like stopwatch or date.
Phone Finder
Misplaced your smartphone? All it takes is the push of a button on your watch and the smartphone sounds an alarm.
Automatic calendar with Date, Day and Month
Once set, the automatic calendar always displays the correct date.
12/24-hour timekeeping
Times can be displayed in either a 12-hour or 24-hour format.
Mineral glass
The tough mineral glass resists scratching.
Carbon-reinforced resin casing
Thanks to its extremely high level of durability, resin is the ideal material for watches. Combining resin with carbon—a particularly robust material—creates a casing that is even more stress-resistant and offers even greater protection against external influences, resulting in an extremely high level of durability.
Carbon bezel
Resin band
Synthetic resin is the ideal material for wrist straps thanks to its extremely durable and flexible properties.
Buckle
Battery change indicator
An icon appears when it is time to change the battery.
2 Years - 1 Battery
The battery supplies the watch with sufficient energy for approx. two years.
Water resistance classification (20 bar)
Perfect for free diving without scuba gear: the watch is water resistant up to 20 bar according to ISO 22810.
Dimensions (H x W x D)
55,4mm x 52,90mm x 19,3mm
Weight
approx. 92 g

The GG-B100 takes the Mudmaster in a few new directions while also introducing some key new technology for Casio. What isn’t new for Casio, but is new for the Mudmaster, is that the G-Shock GG-B100 is the first “connected” Mudmaster, which means it includes Bluetooth connectivity, allowing it to intelligently integrate with the G-Shock smartphone app. I’ve discussed this G-Shock app in other aBlogtoWatch articles but suffice it to say that it allows you to both control your watch from the app along with combine data from the watch and your phone together for new types of useful functionality.

More specifically, this is the first “Quad Sensor” G-Shock watch from Casio that includes a step-counter. Triple Sensor watches have a compass, barometer/altimeter, and thermometer. The fourth sensor is an integrated step-counter (pedometer). While this technology is relatively simple, it hasn’t been included in a G-Shock watch before and helps the GG-B100 be that much more relevant for today’s consumers in an era where activity-tracking is so pervasive. The Mudmaster GG-B100 integrates with the G-Shock app, combining your phone’s GPS functionality with data collected by the watch for an interesting set of metrics, including useful information like the number of steps you’ve taken, along with the distance you’ve traveled. Casio specifically points out that the GG-B100 offers a mission altitude and position log function, a calorimeter (estimated calories burned), and location indicator as features attainable when the watch and phone app work together. Without having tested the functionality, I can’t speak too much to its real-world practicality but I am very much enthused that Casio continues to push the boundaries of what G-Shock owners can expect from their timepieces.

Using the combination analog/digital face, the module inside the new Mudmaster has a slew of both new and expected functionality, including everything from a sunrise/sunset indicator and five daily alarms, to a world time indicator and a chronograph. All that is missing for me in the movement is solar-power generation, which means that the user merely needs to change batteries every few years. Stylewise, the new Mudmaster GG-B100 face is one of the best ana-digi dials I’ve ever seen from Casio, combining a very legible set of analog hands and hour markers (fully lumed) with an attractive negative-tone (darker color) LCD display located near 6 o’clock. A few years ago, I was still skeptical as to Casio’s ability to really make its analog dials G-Shock watches — outside of traditional markets in Japan and nearby — success stories. Today they have proven me wrong, and I find myself mostly wearing analog dial G-Shock over fully digital-dial alternatives. Why? Simply because they look a bit more attractive and mature. An analog dial also gives these types of watches a more high-end look, to be honest.

Perhaps some of the best technology in the G-Shock Mudmaster GG-B100 isn’t in the movement, but rather the case. Water resistant to 200 meters, the new Mudmaster is significantly lighter than the previous generation model. thanks to an entirely new case architecture that Casio refers to as “Carbon Core Guard.” Casio is now using more carbon fiber materials, as well as a new resin fiber class caseback construction. The new Mudmaster is more shock and debris-resistant than ever before, along with being lighter in weight. The watches also look more modern, and the older-style metal caseback feels like a vestige from the past when combined with the modern looks and materials of the rest of the timepiece.

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The Mudmaster GG-B100-1A3 bezel has the look of carbon fiber but is carbon fiber mixed with resin. Casio does, however, use entirely carbon fiber parts for some of its more expensive G-Shock models — and in the near future, the all-carbon fiber parts will likely find their way into models at this price-point. A new design for the pushers allowed Casio to remove some of the visual bulk, while promising incredible levels of mud, dirt, and dust resistance (not to mention water resistance). The pushers are also all-metal and have a really cool non-slip texture pattern on them. You can admire this pleasant-looking surface texture on the front-mounted pusher (which happens to activate the backlight).