---
product_id: 446698353
title: "GA-B2100C-9AER Mens G-Shock Smartwatch"
brand: "casio"
price: "R4693"
currency: ZAR
in_stock: true
reviews_count: 13
category: "Casio"
url: https://www.desertcart.co.za/products/446698353-ga-b2100c-9aer-mens-g-shock-smartwatch
store_origin: ZA
region: South Africa
---

# 20-bar water resistance, swim-ready Bluetooth sync for perfect time Solar-powered, no battery hassle GA-B2100C-9AER Mens G-Shock Smartwatch

**Brand:** casio
**Price:** R4693
**Availability:** ✅ In Stock

## Summary

> ⚡ Own the moment with the solar-powered, sync-smart G-Shock that’s as bold as your ambition.

## Quick Answers

- **What is this?** GA-B2100C-9AER Mens G-Shock Smartwatch by casio
- **How much does it cost?** R4693 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/446698353-ga-b2100c-9aer-mens-g-shock-smartwatch)

## Best For

- casio enthusiasts

## Why This Product

- Trusted casio brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Eco-Chic Power:** Solar-powered battery means zero downtime and zero battery changes—stay powered sustainably and stylishly.
- • **Built for Adventure:** 20-bar water resistance lets you dive into life’s moments without worry—whether poolside or on the trail.
- • **Effortless Timekeeping:** Bluetooth connectivity ensures your watch is always perfectly synced with your smartphone—never miss a beat.
- • **Bold & Lightweight Design:** Striking yellow resin case and strap with a slim 11mm profile, weighing only 52g for all-day comfort and standout style.
- • **Precision Meets Practicality:** Integrated calendar, stopwatch, and durable stainless steel buckle combine function with fashion for the modern professional.

## Overview

The Casio GA-B2100C-9AER is a solar-powered, Bluetooth-enabled G-Shock smartwatch featuring a durable yellow resin case and strap, 20-bar water resistance, and a suite of practical functions including calendar and stopwatch. Lightweight at 52g with a slim 11mm profile, it offers seamless smartphone syncing and reliable timekeeping, making it the perfect blend of rugged style and modern tech for the dynamic professional.

## Description

This trendy watch is a perfect gift for New Year, birthday,valentine's day and so on -The watch has a calendar function: Day-Date, Bluetooth, Solar Powered and Stop Watch

Review: Casio hits the spot yet again.👍 - G-Shocks are something of a "Marmite" thing in the watch enthusiast community, but like them or loathe them, their place(s) in many collections is(are) justified in my view, so excuse me if this review appears somewhat subjective. That said, if I have moans about an item, they will be listed along with the good points. Onwards... The good bits: This watch is yellow, very yellow! It's also nowhere near as fat as some older G-Shocks and wears very well for a watch whose case size ought to look like a dinner plate on my tiny wrist. Yet it fits every bit as well thanks to the many adjustment holes in its (yellow) two piece strap.The wrist in the attached images has a circumference of a mere 5⅛ inches yet, thanks to the strap heading downwards from the case - a common thing among larger Gs made even more versatile here by the strap's use of quick release spring bars, though a general purpose aftermarket strap would need to be approximately 14mm wide and would lack the visual flow of the factory's stepped strap design, which flares out to match the attachment points on the watch case. Given how much adjustment is available here, even a thick wristed man could find this just as comfortable as I, a skinny wristed woman, do. The buckle appears at first glance to be the plastic type found on some more budget oriented Casios, but no, it is made from a nicely finished - no sharp edges here - piece of stainless steel. Then we come to what it does: This watch has the Bluetooth facility so that the time can be synchronised with your smartphone, tablet, etc. I find this to be more useful for making settings adjustments as the paired device will have a much larger display than the G's digital area, bottom right of the dial. I deliberately avoided letting the watch connect to my phone for two weeks after the initial pairing and setup. Unsurprisingly, the watch remained accurate as most of the range will when left to their own regulation of the time displayed. OK, so I admit that I like most G-Shocks though for me, the resin case is a large part of the appeal and a factor in the brand's legendary resistance to damage, but if the buyer were thinking of modifying their G's appearance by fitting one of the many "upgrade" kits available these days, I would tread carefully and perhaps read my review of how such a mod went when I bought a kit. Best advice; if you must have some metal attached to a light watch whose feel and balance on wrist is a result of its synthetic construction materials, buy one of the Gs that come from the factory with metal cases and straps. Those won't give you a nasty rash, are made beautifully and tend not to feel top heavy. I get the appeal of modifying a watch, but was glad to refit the original plastics to my GA-B2100 after my own less than worthwhile decision to mod the watch. All that experience taught me is that the G-Shock is just right as its maker provided and if I feel the need for a heavy metal experience again, I shall satisfy this urge by listening to a classic AC-DC album at full volume. So what's not so good about the GA-B2100? Sorry folks, but I did say at the start that I may become subjective and OK, so some of us will spend ages looking for some glitch or other, but there really isn't anything that disappoints me about this watch. Sorry there's nothing to report, but buying a watch from the 2100 range is very unlikely to be something you'd regret. I chose the solar one with Bluetooth, and it was on offer at the time, but even at around the typical maximum £160 or so, I would have been just as happy with my purchase. End.😁 🌟🌟🌟🌟🌟
Review: G Shock quality. Very light and looks fantastic also no more messing around with batteries. - Visually this watch is eye-catching in this colour. It looks superb and is of the usual high quality you would expect of the G Shock brand. Extremely easy to set up and auto updates (if selected to on app) via Bluetooth with your phone so keeping absolute correct time. Also this watch is solar powered so no more messing around with batteries. This is a bonus as you don't have to worry about seals being compromised if you swim wearing the watch which is 20bar rated. Highly recommend.

## Features

- This trendy watch is a perfect gift for New Year, birthday,valentine's day and so on -The watch has a calendar function: Day-Date, Bluetooth, Solar Powered and Stop Watch
- High quality 21 cm length and 24 mm width Yellow Plastic strap with a Buckle
- Case diameter: 46 mm,case thickness: 11 mm, case colour: Yellow and dial colour: Black
- Water resistant: 20 bars -Weight: 52 g
- The watch is delivered in an original box and has a warranty of 2 years

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B0B1Q5PPQG |
| Batteries  | 1 Lithium Metal batteries required. (included) |
| Best Sellers Rank | 177,942 in Fashion ( See Top 100 in Fashion ) 1,183 in Men's Wrist Watches |
| Country of origin  | China |
| Customer reviews | 4.5 4.5 out of 5 stars (432) |
| Date First Available  | 20 May 2022 |
| Department  | Men's |
| Is discontinued by manufacturer  | No |
| Item model number  | GA-B2100C-9AER |
| Manufacturer  | Casio |

## Images

![GA-B2100C-9AER Mens G-Shock Smartwatch - Image 1](https://m.media-amazon.com/images/I/61rA4JW4K1L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Casio hits the spot yet again.👍
*by J***E on 13 January 2023*

G-Shocks are something of a "Marmite" thing in the watch enthusiast community, but like them or loathe them, their place(s) in many collections is(are) justified in my view, so excuse me if this review appears somewhat subjective. That said, if I have moans about an item, they will be listed along with the good points. Onwards... The good bits: This watch is yellow, very yellow! It's also nowhere near as fat as some older G-Shocks and wears very well for a watch whose case size ought to look like a dinner plate on my tiny wrist. Yet it fits every bit as well thanks to the many adjustment holes in its (yellow) two piece strap.The wrist in the attached images has a circumference of a mere 5⅛ inches yet, thanks to the strap heading downwards from the case - a common thing among larger Gs made even more versatile here by the strap's use of quick release spring bars, though a general purpose aftermarket strap would need to be approximately 14mm wide and would lack the visual flow of the factory's stepped strap design, which flares out to match the attachment points on the watch case. Given how much adjustment is available here, even a thick wristed man could find this just as comfortable as I, a skinny wristed woman, do. The buckle appears at first glance to be the plastic type found on some more budget oriented Casios, but no, it is made from a nicely finished - no sharp edges here - piece of stainless steel. Then we come to what it does: This watch has the Bluetooth facility so that the time can be synchronised with your smartphone, tablet, etc. I find this to be more useful for making settings adjustments as the paired device will have a much larger display than the G's digital area, bottom right of the dial. I deliberately avoided letting the watch connect to my phone for two weeks after the initial pairing and setup. Unsurprisingly, the watch remained accurate as most of the range will when left to their own regulation of the time displayed. OK, so I admit that I like most G-Shocks though for me, the resin case is a large part of the appeal and a factor in the brand's legendary resistance to damage, but if the buyer were thinking of modifying their G's appearance by fitting one of the many "upgrade" kits available these days, I would tread carefully and perhaps read my review of how such a mod went when I bought a kit. Best advice; if you must have some metal attached to a light watch whose feel and balance on wrist is a result of its synthetic construction materials, buy one of the Gs that come from the factory with metal cases and straps. Those won't give you a nasty rash, are made beautifully and tend not to feel top heavy. I get the appeal of modifying a watch, but was glad to refit the original plastics to my GA-B2100 after my own less than worthwhile decision to mod the watch. All that experience taught me is that the G-Shock is just right as its maker provided and if I feel the need for a heavy metal experience again, I shall satisfy this urge by listening to a classic AC-DC album at full volume. So what's not so good about the GA-B2100? Sorry folks, but I did say at the start that I may become subjective and OK, so some of us will spend ages looking for some glitch or other, but there really isn't anything that disappoints me about this watch. Sorry there's nothing to report, but buying a watch from the 2100 range is very unlikely to be something you'd regret. I chose the solar one with Bluetooth, and it was on offer at the time, but even at around the typical maximum £160 or so, I would have been just as happy with my purchase. End.😁 🌟🌟🌟🌟🌟

### ⭐⭐⭐⭐⭐ G Shock quality. Very light and looks fantastic also no more messing around with batteries.
*by P***N on 18 September 2023*

Visually this watch is eye-catching in this colour. It looks superb and is of the usual high quality you would expect of the G Shock brand. Extremely easy to set up and auto updates (if selected to on app) via Bluetooth with your phone so keeping absolute correct time. Also this watch is solar powered so no more messing around with batteries. This is a bonus as you don't have to worry about seals being compromised if you swim wearing the watch which is 20bar rated. Highly recommend.

### ⭐⭐⭐⭐⭐ Buy this watch!
*by D***N on 20 May 2025*

What a great watch. Perfect for everyday use, no matter if you’re in the office or climbing a mountain. The connection to the app makes setting time and other settings a breeze, and the colour really pops. On top of that, priced extremely reasonably, especially if you can find it on sale. Cannot recommend enough, Casio have outdone themselves yet again.

## Frequently Bought Together

- Casio Men Analogue-Digital Quartz Watch with Plastic Strap GA-B2100C-9AER
- Casio Men Analogue-Digital Quartz Watch with Plastic Strap GA-B2100-1AER

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-03*