hile the smartwatch industry battles over whose screen can drain a battery faster in a day and a half, Japanese engineers decided to play the long game. They just dropped a device that defiantly ignores the arms race. Casio introduced the new G-Shock Mudman GDG-B100 series of rugged watches in Japan, priced at 38,500 yen or $245, with sales starting in October.
For that money, you get a device that forces a fresh look at the very idea of a wrist gadget. Instead of turning a watch into a miniature smartphone, always fearing you’ll lose connection by evening, Casio pared it down to just the essential functions needed for daily life, then packed it into an indestructible shell.
The mechanics are simple: instead of power-hungry color screens, it features a high-contrast digital display that’s perfectly legible in direct sunlight and illuminated by a red LED in the dark.
The line includes three models: the black GDG-B100-1, the GDG-B100-1A3 with olive accents, and the GDG-B100-1A5 with sand-colored elements.
The line includes three models: the black GDG-B100-1, the GDG-B100-1A3 with olive accents, and the GDG-B100-1A5 with sand-colored elements.
Measuring 63.6×49.6×16.2 mm and weighing 66 grams, the case is made from carbon-fiber-reinforced resin with special button gaskets to protect against dirt, dust, and sand. Water resistance is rated at ATM20, which means you don't need to take the watch off while swimming, diving, or recreational scuba diving at shallow depths.
What’s Inside and Why It’s Worth the Money
Forget about installing third-party apps or pointless message replies from your wrist—that’s not even an option here. The built-in sensor tracks steps, estimates pace, distance traveled, and calories burned. The watch lacks its own GPS, so it uses the connected smartphone’s GPS for initial calibration, after which the GDG-B100 can independently estimate distance.
It connects to your smartphone via Bluetooth through the Casio Watches app, providing automatic time synchronization and vibration alerts for incoming calls, emails, and app messages.
The watch connects to your smartphone via Bluetooth through the Casio Watches app.
However, these watches do not feature Casio’s proprietary Tough Solar power system.
However, the GDG-B100 watches do not feature Casio’s proprietary Tough Solar power system, and instead use a standard CR2032 battery, which lasts for approximately two years.
For the average user, this means one crucial thing: you can officially ditch the daily gadget charging ritual for two years. In return, you get a reliable tool with a stopwatch, interval timers, and world time for 38 time zones.
Key takeaways
- For $245, the new Casio G-Shock Mudman GDG-B100 offers an honest deal: it sheds feature-overloaded smartwatch bloat for two years of battery life on a standard coin cell, full water resistance, and basic activity tracking. This is a pragmatic choice for anyone tired of charging gadgets every night who values true ruggedness.