G-Shock
MTGB4000B1A2 MTG-B4000 Series

Discover innovative form and structural beauty — MT-G timepieces that combine metal materials with the resin used in the first G-SHOCK models.

The MTGB4000 features an updated Dual Core Guard structure developed with the aid of artificial intelligence and an all-new frame design that combines carbon fiber and stainless steel. This unprecedented exterior achieves a new harmony of strength and beauty, pushing the frontiers of design.

This timepiece is a seamless collaboration between AI capabilities and human developers, creatively integrating materials, structure, and design into an organic whole of functional beauty. Base designs created by human designers were analyzed and simulated by AI to generate an optimized 3D prototype, which was then further refined by the human hand to achieve a unique form that organically synthesizes functionality and beauty.

The intricate, dimensional form of the frame is cut out from a base material of laminated carbon and glass fiber sheets, creating a beautifully layered pattern. The stainless-steel components of the bezel are polished with separate hairline and mirror finishes for a sophisticated textural look.

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

With the MTG-B4000B-1A2, we introduce a newly developed blue-gray ion-plating on the bezel and other stainless-steel components.

The meticulous attention paid to every detail is apparent down to the sapphire crystal, which delivers high transparency, and the delicately crafted dial achieved with fine processing technology from Yamagata Casio.

This innovative, tough new style delivers full-on 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.

Basic Information

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/App Connectivity Features

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

Compatible band size

• 145 to 215 mm

Other

• Neobrite

Watch 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