The MT-G series combines resin and metal materials, the origins of G-SHOCK, to pursue innovative structural beauty.

The MTG-B4000 features a new dual core guard structure developed by AI using accumulated impact resistance data, and a carbon and stainless steel mixed-material frame.

This resulted in an innovative design that is both strong and beautiful.

Through co-creation between AI and humans, materials, structure and form are organically combined in pursuit of original functional beauty.

In the development process using AI, the AI analyzes and optimizes the designer's base proposal, and by repeating this process in a complementary manner, we were able to achieve a shape that is both functional and beautiful.

The carbon laminated frame is made by cutting a base material made of laminated sheets of carbon and glass fiber into a three-Dimensional shape to form a complex frame.

The stainless steel parts of the bezel are two-piece, inside and outside.

Each part is polished with a hairline finish and a mirror finish for a beautiful finish.

It also features TRIPLEG RESIST, which is shock-resistant, centrifugal force-resistant, and vibration-resistant.

The back cover is three-Dimensionally molded using metal injection molding (MIM),
a process that involves injecting powdered metal, to protect the case.

The MTG-B4000B-1A2 features a newly developed blue-gray IP finish on stainless steel parts such as the bezel.

In addition, attention has been paid to every detail, including the use of highly transparent sapphire glass and the dial featuring a delicate design created using micro-machining technology at the Casio Yamagata factory.

In terms of functionality, the watch can connect to the dedicated app "CASIOWATCHES" via Bluetooth® communication to obtain time information.

It also comes equipped with practical functions such as Multiband 6, Tough Solar, and a high-brightness LED light.
- Triple G Resist (shock-resistant, centrifugal force-resistant, vibration-resistant)
- Tough Solar (solar charging system)
- 20 ATM water resistance
Radio wave reception function: Automatic reception (up to 6 times/day) (Chinese radio waves up to 5 times/day)/Manual reception, Received radio waves: JJY, Frequency: 40kHz/60kHz (Fukushima/Kyushu station compatible model) Received radio waves: WWVB, Frequency: 60kHz Received radio waves: MSF/DCF77, Frequency: 60kHz/77.5kHz Received radio waves: BPC, Frequency: 68.5kHz
* If you set the home time setting to a city that can receive radio waves, the station corresponding to the city will be received.

The time difference is set according to the city or time zone you set.
- Mobile Link function (function linkage via Bluetooth® communication with compatible mobile phones)
- Automatic needle position correction function
World time: 27 cities (38 time zones) + UTC (Coordinated Universal Time),
home city swap function.
* May be updated by connecting to a smartphone.
- Stopwatch (1 second, 24 hour)
- Timer (set unit: 1 minute, maximum set 24 hours, measured in 1 second units)
- Electronic alarm
- Battery indicator display
- Power saving function (hands stop moving after a certain period of time in a dark place to save power)
- Date and day of the week display
- Fully automatic calendar
- LED light (Super Illuminator, with afterglow function)
- Operating time from full charge without solar power generation When using functions: Approximately 5 months When in power saving mode: Approximately 18 months
* If there is no radio reception or if the watch is not linked to a smartphone, it will operate with normal quartz accuracy (average monthly difference of ±15 seconds).

Model Number: MTG-B4000-1AJF