---
product_id: 393439228
title: "GSTB400-1A, black, G-Steel"
brand: "g-shock"
price: "B/.782"
currency: PAB
in_stock: true
reviews_count: 5
category: "G Shock"
url: https://www.desertcart.com.pa/products/393439228-gstb400-1a-black-g-steel
store_origin: PA
region: Panama
---

# Tough Solar Power Bluetooth Mobile Link Carbon Core Guard Impact Resistance GSTB400-1A, black, G-Steel

**Brand:** g-shock
**Price:** B/.782
**Availability:** ✅ In Stock

## Summary

> ⚡ Stay sharp, stay connected, stay unstoppable.

## Quick Answers

- **What is this?** GSTB400-1A, black, G-Steel by g-shock
- **How much does it cost?** B/.782 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/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 style.
- • **Intuitive Controls:** Oversized stainless steel buttons for smooth, precise operation every time.
- • **Slimmest G-Steel Yet:** At just 12.9mm thick, it’s the ultimate blend of sleek and sturdy.
- • **Solar-Powered Freedom:** Never worry about batteries—solar tech keeps you charged 24/7.
- • **Effortless Connectivity:** Bluetooth sync keeps your time flawless without lifting a finger.

## Overview

The Casio G-Shock GSTB400-1A G-Steel is a cutting-edge, ultra-thin solar-powered watch featuring Bluetooth connectivity for automatic time syncing, housed in a carbon core guard structure for superior shock resistance. With a sleek 12.9mm profile, large stainless steel buttons, and multi-finish bezels, it combines rugged durability with refined style, perfect for the modern professional on the move.

## 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: I really wanted a daily driver watch that could handle abuse, so of course I turned to Casio G-Shock. This watch is a beauty to behold on the wrist, the pictures don't quite do it justice. I love all the features on this watch, especially the solar power and bluetooth connectivity. I've had it for a few weeks now and it's never indicated less than a full charge, even when left for a few days on the nightstand with low or no light. It syncs the time automatically with my phone a few times each day, so I never have to worry about setting the time. The one gripe I've seen a lot of people express, which is valid, is that the negative displays on the 2 small digital readouts is a bit dark when in low or indirect light. Outside or in the office, I can read it fine. However, it does have a button for an LED light and backlight on the displays, so if you need to read them you just need to press the Light button. I've even used the LED light a few times to find my way in the dark (it's way brighter than a smartphone screen). I don't find it to be a problem, but I can understand how some would consider the negative displays as a drawback. Overall though, I really love this watch and can't recommend it enough!
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 |
| Batteries  | 1 LR44 batteries required. (included) |
| Best Sellers Rank | #64,351 in Fashion ( See Top 100 in Fashion ) #1,554 in Men's Wrist Watches |
| Customer reviews | 4.5 4.5 out of 5 stars (91) |
| Date First Available  | 14 June 2021 |
| Department  | Mens |
| Item model number  | GSTB400-1A |
| Manufacturer  | G-Shock |
| Product Dimensions  | 20.32 x 12.7 x 12.7 cm; 226.8 g |

## 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 B***Y on 15 September 2021*

I really wanted a daily driver watch that could handle abuse, so of course I turned to Casio G-Shock. This watch is a beauty to behold on the wrist, the pictures don't quite do it justice. I love all the features on this watch, especially the solar power and bluetooth connectivity. I've had it for a few weeks now and it's never indicated less than a full charge, even when left for a few days on the nightstand with low or no light. It syncs the time automatically with my phone a few times each day, so I never have to worry about setting the time. The one gripe I've seen a lot of people express, which is valid, is that the negative displays on the 2 small digital readouts is a bit dark when in low or indirect light. Outside or in the office, I can read it fine. However, it does have a button for an LED light and backlight on the displays, so if you need to read them you just need to press the Light button. I've even used the LED light a few times to find my way in the dark (it's way brighter than a smartphone screen). I don't find it to be a problem, but I can understand how some would consider the negative displays as a drawback. Overall though, I really love this watch and can't recommend it enough!

### ⭐ 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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*Product available on Desertcart Panama*
*Store origin: PA*
*Last updated: 2026-02-05*