Casio G-Shock MTG-B4000 Series - MTGB4000B-1A

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Discover innovative form and structural beauty — MT-G timepieces that combine metal materials with the resin used in the first G-SHOCK models. Now, in the powerful form and refined elegance of carbon fiber and metal in black. 

The MTG-B4000 features an updated Dual Core Guard structure with a frame design integrating carbon fiber and stainless steel, which was developed with the aid of artificial intelligence trained with big data on impact resistance. The result is an innovative design that delivers both strength and beauty. 

A seamless collaboration between AI capabilities and human developers, this timepiece creatively integrates materials, structure, and design into an organic whole of functional beauty. Base designs created by human designers were analyzed and simulated by AI and then reevaluated and further refined by the human hand to render a unique form that organically synthesizes functionality and beauty. 

The intricate, dimensional form of the frame is created from a base material of laminated carbon and glass fiber sheets, revealing a beautifully layered pattern. The bezel features a dual-layer design of inner and outer bezels, with stainless-steel components polished with separate hairline and mirror finishes, then ion-plated in black for a sophisticated textural look. 

The watch employs the Triple G Resist structure to withstand shock, centrifugal force, and vibration. The case is also protected by the dimensional form of the case back, which is created using metal injection molding (MIM), a method of processing metal in which fine metal powder is injected into molds. 

For the MTG-B4000B-1A, the multi-layered carbon frame and dial are accented with touches of vibrant red and paired with a supple, yet durable soft urethane band, for a dynamic and sporty design. 

Beyond employing the sapphire crystal for high transparency, meticulous attention to detail is apparent throughout, including the delicate components of the intricate dial design, achieved with fine processing technology from Yamagata Casio.  

This innovative, tough style delivers full-on practical functionality, as well. Download the CASIO WATCHES app to pair with your smartphone via Bluetooth®. With Multiband 6, Tough Solar charging system, and high-brightness LED light, these timepieces keep you at peak performance, whatever your adventures may bring. 

Case size (L× W× H): 56.6 × 45.3 × 14.4 mm
Weight: 112 g
Case and bezel material: Carbon / Stainless steel
Band: Resin Band
Construction: TRIPLE G RESIST (Shock resistant, Centrifugal 
force resistant, Vibration resistant) Carbon Core Guard structure
Water resistance: 200-meter water resistance
Time adjustment
Radio-controlled Watch; Multi band 6
Bluetooth: Connects to a smartphone and automatically adjusts the time
Power supply and battery life: Tough Solar (Solar powered)

Smartphone Link feature: Mobile link (Wireless linking using Bluetooth®)
Apps:CASIO WATCHES
App connectivity feature
Auto time adjustment
Easy watch setting
Approximately 300 world time cities
Time & place
Watch status display
Self check
Phone finder

Glass: Sapphire crystal with anti-reflective coating
Crown: Screw Lock Crown
Surface treatment: Black ion plated bezel
Compatible band size: 145 to 215 mm
Other: Neobrite

FEATURES
World time
38 time zones (27 cities + coordinated universal time), Home city time swapping, auto summer time (DST) switching
* Subject to updates by connection between the watch and a phone.

Stopwatch
1-second stopwatch
Measuring capacity: 23:59'59

Timer
Countdown timer
Measuring unit: 1 second
Countdown range: 24 hours
Countdown start time setting range: 1 minute to 24 hours (1-second increments)

Alarm / hourly time signal
Daily alarm

Light
LED light (Super Illuminator)
Afterglow

Light color
LED:White

Calendar
Full auto-calendar (to year 2099)

Hand home position correction feature
The auto hand home position correction

Energy saving feature
Power Saving (hands stop to save power when the watch is left in the dark)

Battery display/alert
Battery level indicator

Run time
Approx. battery operating time:
5 months on rechargeable battery (operation period with normal use without 
exposure to light after charge)
18 months on rechargeable battery (operation period when stored in total 
darkness with the power save function on after full charge)

Accuracy
Accuracy: ±15 seconds per month (with no signal calibration and mobile link function)

Other features
Regular timekeeping:
Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 
3 dials (dual time hour and minute, dual time 24-hour, day)
Day indicator
Date display

Time adjustment details
Time calibration signal reception
Auto receive up to six* times a day (remaining auto receives canceled 
as soon as one is successful)
*5 times a day for the Chinese calibration signal
Manual receive
The latest signal reception results
Time Calibration Signals
Station name: DCF77 (Mainflingen, Germany)
Frequency: 77.5 kHz
Station name: MSF (Anthorn, England)
Frequency: 60.0 kHz
Station name: WWVB (Fort Collins, United States)
Frequency: 60.0 kHz
Station name: JJY (Fukushima, Fukuoka/Saga, Japan)
Frequency: 40.0 kHz (Fukushima) / 60.0 kHz (Fukuoka/Saga)
Station name: BPC (Shangqiu City, Henan Province, China)
Frequency: 68.5 kHz

MTGB4000B-1A G-Shock
MTGB4000B1A Gshock