Casio G-Shock GM-B2100GD-9A Full Metal Solar Bluetooth Men's Watch

The Casio G-shock GM-B2100AD-9A Full Metal Tough Solar Black Dial Bluetooth Men's Watch is a modern reimagining of the iconic G-SHOCK legacy, inspired by the first-ever DW-5000C. This timepiece boasts a refined full-metal construction, featuring a screw-back case, bezel, and band made from solid stainless steel. Its signature Gold ion plated octagonal bezel and dimpled band, reminiscent of the 1983 original, are crafted using a meticulous forging, cutting, and polishing process. The bezel's top surface is adorned with a circular hairline finish, while its slopes are mirror-polished for a striking visual contrast. The 49.8 × 44.4 × 12.8 mm case, weighing 165 g, is designed for durability with shock-resistant construction and fine resin buffering components for impact protection. The rich Black dial showcases sophisticated copper-colored vapor deposition, accentuated by the precision molding of Yamagata Casio's ultra-fine processing technology. Powered by Tough Solar technology, this watch ensures continuous operation through solar charging, while a high-brightness LED light enhances visibility. Bluetooth connectivity allows for seamless synchronization with a smartphone via the CASIO WATCHES app, offering automatic time adjustment, world time settings, and convenient features like phone finder and easy watch customization. Water-resistant up to 200 meters and equipped with a solid stainless steel band with a one-touch 3-fold clasp, the GM-B2100AD-9A blends rugged toughness with refined elegance, making it a versatile choice for any occasion. Available at Watch Zone. UPC: 4549526344541 

Smartphone Link/App Connectivity Features
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
Reminder
Phone finder

Watch Features

World time 
38 time zones (38 cities + coordinated universal time), auto summer time (DST) switching, home city/world time city swapping

Stopwatch
1/100-second stopwatch
Measuring capacity: 
00'00''00~59'59''99 (for the first 60 minutes)
1:00'00~23:59'59 (after 60 minutes)
Measuring unit: 
1/100 second (for the first 60 minutes)
1 second (after 60 minutes)
Measuring modes: Elapsed time, lap/split time

Timer
Countdown timer
Measuring unit: 1 second
Countdown range: 60 minutes
Countdown start time setting range: 1 second to 60 minutes (1-second increments and 1-minute increments)

Alarm/hourly time signal
5 daily alarms
Hourly time signal
Light
Double LED light
LED light for the face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
LED backlight for the digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
Light color
LED: White

Calendar
Full auto-calendar (to year 2099)

Mute feature
Button operation tone on/off

Energy saving feature

Power Saving (display goes blank to save power when the watch is left in the dark)

Battery display/alert
Battery level indicator

Run time
Approx. battery operating time:
7 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 mobile link function)

Other features
Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
12/24-hour format
Date/month display swapping
Day display (days of the week selectable in six languages)

Regular timekeeping:
Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (battery level, mode)
Digital: Hour, minute, second, pm, month, date, day
Operation Guide (Opens in a new tab)