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Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Sep 19 - Sep 24
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
CASIO G-Shock DUO Bluetooth Yellow Resin GAB2100C-9AUpgrade the retro look you love with the octagonal GA 2100 line, which inherits the design concept of the very first G SHOCK, but now with Smartphone Link and Tough Solar power. Specifications Basic Information Case size (L W H) 48. 5 45. 4 11. 9 mm Weight 52 g Case and bezel material Case bezel material: Carbon Resin Band Resin Band Construction Shock Resistant Carbon Core Guard structure Water resistance 200 meter water resistance Power supply and
Upgrade the retro look you love with the octagonal GA-2100 line, which inherits the design concept of the very first G-SHOCK, but now with Smartphone Link and Tough Solar power.
Specifications
Basic Information
- Case size (L× W× H)
- 48.5 × 45.4 × 11.9 mm
- Weight
- 52 g
- Case and bezel material
- Case / bezel material: Carbon / Resin
- Band
- Resin Band
- Construction
- Shock Resistant
- Carbon Core Guard structure
- Water resistance
- 200-meter water resistance
- 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
- Reminder
- Phone finder
Exterior
- Mineral Glass
- Neobrite
Watch Features
- World time 38 time zones (38 cities + coordinated universal time), city code display, city name display, daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping
- 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
- 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
- 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)
- 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
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 11 reviews
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Product Reviews
★★★★★ 5
Impressive quality
Color: Dark Brown
I'm impressed with the quality at this low cost.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
★★★★★ 5
My favorite wallet
Good quality. Solid design, expertly crafted.
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Reviewed in the United States on November 4, 2025
★★★★★ 2
Does not block RFID scanners
Does not block RFID scanners. I literally scan my badge into work every day through it. Other than that, they are nice wallets, but only last about 3 years before the leather starts crumbling off. This is the second one I have bought.
2 Stars because they only last about 3 years and does not block RFID scanning as advertised.
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Reviewed in the United States on July 10, 2025
★★★★★ 5
2nd time purchase in 7 years.10 stars!
This wallet design is fantastic. Compact, front or back pocket use. Has a ton of storage even though it doesn't look it. Last one lasted 7 years of abuse and use. I ordered 2 in case these never get made again. Grab one, best wallet and real durable leather, not fake leather.
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Reviewed in the United States on December 3, 2025
★★★★★ 5
Great wallet
Size: One Size, Color: Black (Money Clip)
Doesn't disappoint. Stays firm and strong as brand new.
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Reviewed in the United States on January 25, 2026