These models, which inherit the octagonal shape of the original G-SHOCK model DW-5000C, include the GMW-B5000, GM-B2100, and GMC-B2100, and feature a black top bezel with the iconic octagonal shape.

The black accents against the silver accents emphasize the iconic strength of G-SHOCK, while the monotone design makes it easy to match with a wide range of styles.

The GMW-B5000BT features a mirror-finished top bezel and silver vapor deposition on part of the glass, adding a sophisticated shine to its tough style.

The GM-B2100BT and GMC-B2100BT feature a hairline finish on the top bezel, creating a subdued metallic look.

In addition, to improve visibility, the indexes are silver-plated to create a striking contrast with the dial.

The stainless steel bezel is beautifully finished after being forged, cut, and polished to create a three-dimensional shape.

To achieve a full-metal shock-resistant structure, a fine resin cushioning material is installed between the bezel and case.

The metal band pieces are dimpled, inheriting the resin band design of the original G-SHOCK.

It is manufactured at Yamagata Casio, the mother factory that produced the original G-SHOCK.

Furthermore, the stainless steel cases of the GMW-B5000BT and GM-B2100BT feature screw-back cases that are airtight.
- Shock-resistant structure.
? Tough Solar (solar charging system).
? 20 ATM water resistance.
Radio wave reception function: Automatic reception (up to 6 times/day) (up to 5 times/day for Chinese radio waves) / 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
* When the home time setting is set 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 you select.
- Mobile link function (function linkage via Bluetooth? communication with compatible mobile phones).
5 World Time: 39 cities (39 time zones, daylight saving time automatic setting) + UTC (Coordinated Universal Time),
Home Time swap function included.
Stopwatch (1/100 seconds (less than 1 hour) / 1 second (more than 1 hour),
24-hour counter, split).
Timer (set unit: 1 second, maximum set: 24 hours, measured in 1-second increments).
5 time alarms (only 1 with snooze function).
- Battery charge warning function.
- Power saving function (display turns off after a certain period of time in dark places to save power).
- Fully automatic calendar.
? 12/24 hour display switching.
- Operation sound ON/OFF switching function.
- Date display (month/day display swap).
- Day of the week display (switchable between 6 languages: English, Spanish, French, German, Italian, and Russian).
LED backlight (full auto light, super illuminator, fade-in/fade-out, afterglow function, afterglow time switch (2 seconds/4 seconds).
Operating time from full charge without solar power generation: approx. 10 months When using functions: approx. 22 months When in power saving mode:
* When there is no radio wave reception or when not linked to a smartphone, the watch operates with normal quartz accuracy (average monthly deviation of ?15 seconds).

Model Number: GMW-B5000BT-1JF

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