Casio MTGB4000D-1A | G-SHOCK MT-G Silver

Discover innovative form and structural beauty — MT-G timepieces that combine metal materials with the resin used in the first G-SHOCK models. The MTGB4000D 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. 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 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 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, featuring a dual-layer design of inner and outer bezels, are polished with separate hairline and mirror finishes for a sophisticated textural look. The band also features a layered composite construction that integrates stainless steel and carbon fiber-reinforced resin. Combining the ruggedness of metal and lightness of resin, the band has a solid, substantial feel, while ensuring a comfortable fit. 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. Meticulous attention paid to every detail is apparent down to the sapphire crystal, which delivers high transparency. The dial incorporates delicate components featuring intricate designs achieved with fine processing technology from Yamagata Casio. This innovative, tough 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.

Case size (L× W× H):56.6 × 45.3 × 14.4 mm
Weight:178 g
Case and bezel material:Carbon / Stainless steel
Band:Layered Composite Band,One-touch 3-fold Clasp
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
Compatible band size:150 to 205 mm
Other:Neobrite

World time: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
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