---
product_id: 393439228
title: "GSTB400-1A, black, G-Steel"
brand: "g-shock"
price: "76641 kr"
currency: ISK
in_stock: true
reviews_count: 5
category: "G Shock"
url: https://www.desertcart.is/products/393439228-gstb400-1a-black-g-steel
store_origin: IS
region: Iceland
---

# Solar-powered efficiency Bluetooth mobile link Carbon Core Guard impact resistance GSTB400-1A, black, G-Steel

**Brand:** g-shock
**Price:** 76641 kr
**Availability:** ✅ In Stock

## Summary

> ⌚ Elevate your wrist game with the thinnest, toughest G-Steel ever.

## Quick Answers

- **What is this?** GSTB400-1A, black, G-Steel by g-shock
- **How much does it cost?** 76641 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/393439228-gstb400-1a-black-g-steel)

## Best For

- g-shock enthusiasts

## Why This Product

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

## Key Features

- • **Rugged Elegance:** Carbon Core Guard structure delivers military-grade shock resistance with a refined metal finish.
- • **Power That Lasts:** Tough Solar technology means no battery swaps—just endless, eco-friendly energy.
- • **Effortless Operation:** Oversized stainless steel buttons with minimal guards for quick, confident control.
- • **Slimmest G-Steel Yet:** At just 12.9mm thick, it’s the ultimate blend of sleek design and rugged durability.
- • **Seamless Connectivity:** Bluetooth mobile link keeps your watch synced and your schedule on point.

## Overview

The Casio G-Shock GSTB400-1A is a cutting-edge, solar-powered analog-digital watch featuring Bluetooth connectivity, a carbon core guard structure for superior shock resistance, and a slim 12.9mm profile. Designed for professionals who demand durability without bulk, it offers 200-meter water resistance, multi-zone world time, and an elegant multi-finish bezel that shifts with every angle. This watch combines advanced tech with sleek style, making it a must-have for the modern millennial manager.

## Description

From Casio G-Shock, this G-Steel Slim GSTB400 model boasts a new and improved design made possible by even further miniaturization of its parts and thinning of its modules without sacrificing any Bluetooth or solar function. Power consumption has also been significantly reduced. In addition, the carbon core guard structure of this model helps to make it the thinnest of the G-Steel Series (as of April 2021) while maintaining a high level of impact resistance. The thickness from the back cover to the bezel top is only 12.9 mm, which is more than one millimeter less than the GSTB100 model. In terms of design, the number of button guards has been reduced as much as possible, enabling the use of large stainless steel buttons that are slim yet easy to operate. The top bezel has been given five different finishes, while the middle bezel has been given four different finishes, which creates an elegant effect and changes the appearance of the texture of the metal depending on the viewing angle.Case/bezel material: Resin/Stainless steelBlack resin bandMineral GlassNeobriteShock ResistantCarbon Core Guard structure200-meter water resistanceShock resistantTough Solar (Solar powered)Double LED lightLED 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)Mobile link (Wireless linking using Bluetooth(R))Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents)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 swapping1/100-second stopwatchCountdown

Review: This is an exceptional timepiece and great value for the price. Love all the completions. Will look great on your wrist. Like the solar charging function. No batteries!
Review: Casio Watches app is intolerable, intrusive, offensive. Will not buy Casio bluetooth ever again.

## Features

- From Casio G-Shock, this G-Steel Slim GSTB400 model boasts a new and improved design made possible by even further miniaturization of its parts and thinning of its modules without sacrificing any Bluetooth or solar function
- Power consumption has also been significantly reduced
- In addition, the carbon core guard structure of this model helps to make it the thinnest of the G-Steel Series (as of April 2021) while maintaining a high level of impact resistance
- The thickness from the back cover to the bezel top is only 12.9 mm, which is more than one millimeter less than the GSTB100 model
- In terms of design, the number of button guards has been reduced as much as possible, enabling the use of large stainless steel buttons that are slim yet easy to operate

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B092BVGQ1S |
| ASIN  | B092BVGQ1S |
| Additional Features | Shock Resistant, World Time, dual-Time-display, light, stop-watch |
| Age Range Description | Adult |
| Band Color | Black |
| Band Material Type | Plastic |
| Band Width | 28.2 Millimeters |
| Bands | 1 |
| Batteries  | 1 LR44 batteries required. (included) |
| Best Sellers Rank | #77,008 in Fashion ( See Top 100 in Fashion ) #2,224 in Men's Wrist Watches |
| Brand Name | G-Shock |
| Case Diameter | 12.9 Millimeters |
| Case Material Type | Resin |
| Case Thickness | 12.9 Millimeters |
| Character | no subject character |
| Clasp Type | Buckle |
| Closure Type | Buckle |
| Crystal | mineral |
| Customer Reviews | 4.6 4.6 out of 5 stars (94) |
| Customer reviews | 4.6 4.6 out of 5 stars (94) |
| Date First Available  | 14 June 2021 |
| Department  | Mens |
| Dial Color | Black |
| Display | Analog-Digital |
| Embellishment Feature | Crystal |
| Face Style | Digital |
| Included Components | Mobile connection, possibly a double LED light |
| Item Type Name | Sport Watch |
| Item Weight | 0.5 Pounds |
| Item model number  | GSTB400-1A |
| Manufacturer | G-Shock |
| Manufacturer  | G-Shock |
| Manufacturer Part Number | GSTB400-1A |
| Manufacturer Warranty Description | Casio 1 year International Warranty |
| Model Name | GSTB400 |
| Model Number | GSTB400-1A |
| Pattern | Solid |
| Power Source | Solar Powered |
| Product Dimensions  | 20.32 x 12.7 x 12.7 cm; 226.8 g |
| Series Number | 400 |
| Shape | Round |
| Sport Type | Multi-Sport |
| Strap Type | Rubber strap |
| Style Name | G-Steel |
| Theme | Sports |
| UPC | 889232303574 |
| Unit Count | 1 Count |
| Watch Movement Type | Japanese Quartz |
| Water Resistance Depth | 200 Meters |
| Water Resistance Level | Waterproof |

## Images

![GSTB400-1A, black, G-Steel - Image 1](https://m.media-amazon.com/images/I/61dQb+fIRiL.jpg)

## Questions & Answers

**Q: what is the purpose of blue tooth if it's not a smart watch?**
A: THE WATCH SYNCS WITH YOUR SMART PHONE. WHEN CONNECTED YOUR WATCH WILL ALWAYS HAVE THE EXACT CORRECT TIME. YOU CAN ALSO CHAGE THE SETTINGS ON A CONNECTED PHONE. I HAVE SEVERAL WATCHES CONNECTED TO THIS APP. THIS FEATURE REPLACES ATOMIC TIME KEEPING WHICH WORKED WELL BUT ONLY CONNECTED AT NIGHT TO UPDATE THE TIME.

**Q: Is the dial at least sapphire glass for that crazy price?**
A: Mineral Chrystal it’s noted in the description

**Q: Are you a authorized casio dealer?**
A: Hello,

We are official authorized dealer for Casio G-SHOCK. I don't know about the other sellers though.

Best regards,

GTJ

**Q: Does watch have day and date?**
A: Nice watch but, does not have a day of the week. It does have the month and day: 3 20 (March 20th.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by H***. on 27 February 2026*

This is an exceptional timepiece and great value for the price. Love all the completions. Will look great on your wrist. Like the solar charging function. No batteries!

### ⭐ Review
*by A***N on 10 September 2023*

Casio Watches app is intolerable, intrusive, offensive. Will not buy Casio bluetooth ever again.

### ⭐⭐⭐⭐⭐ Review
*by J***A on 14 February 2023*

Es un poco más pequeño de lo que se ve en foto, pero aún así es muy bonito el reloj, es brillante el acabado y se ve genial en tu mano, muy recomendable.

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**Shop now:** [https://www.desertcart.is/products/393439228-gstb400-1a-black-g-steel](https://www.desertcart.is/products/393439228-gstb400-1a-black-g-steel)

---

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-04-22*