Does it need a battery change?

It uses Tough Solar charging, so light keeps it running and routine battery swaps are not part of ownership.

Yes. It is rated to 20 ATM, or 200 meters, which covers swimming and snorkeling but not scuba diving.

What does the Bluetooth link do?

It syncs the time with your phone automatically and can sound your phone when it is misplaced.

How does it compare with a resin G-Shock?

It looks dressier and feels more solid, but it is heavier and costs more than basic resin models.

Is the crystal sapphire?

No. It uses scratch-resistant mineral crystal, which is durable but softer than sapphire.

The watch, its steel bracelet and Casio's documentation; the box contents follow Casio's standard packaging.

What do buyers say about the Casio Men's G-Shock Black Dial Watch GSTB400D-1A?

Rated 3 out of 5 from 6 ratings.

Casio Men's G-Shock Black Dial Watch GSTB400D-1A

Best price now

$383.99at WalmartChecked Nov 11

Prices are checked against each store and labelled with when.

Visit Walmart

Casio Men's G-Shock Black Dial Watch GSTB400D-1A

Best price now

$383.99at WalmartChecked Nov 11

Prices are checked against each store and labelled with when.

Visit Walmart

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Price facts

Last seen at $383.99 at Walmart on Nov 11.

Our take on the Casio Men's G-Shock Black Dial Watch GSTB400D-1A

The Casio G-Shock GSTB400D-1A is a metal-bezel G-Shock from the G-STEEL line, built around a stainless steel case and bracelet with a black dial. It pairs G-Shock toughness — 200-meter water resistance and a scratch-resistant mineral crystal — with Bluetooth smartphone link for automatic time correction and phone finding. It suits people who want a rugged everyday watch that looks dressier than a resin G-Shock. Against resin G-Shocks it is heavier and more formal; against analog-only steel watches it adds connected features and shock resistance.

Best forEveryday wear with a tougher-than-average watchBuyers who want a metal G-Shock rather than resinTravelers who want automatic time correction via phoneGym, outdoor and water use up to 200 m

Pros

Stainless steel case and bracelet give a dressier look than resin G-Shocks
200-meter water resistance covers swimming and snorkeling
Bluetooth link keeps time accurate and helps find a misplaced phone
Scratch-resistant mineral crystal and shock-resistant G-Shock build
Solar charging and Tough Solar keep it running without battery swaps

Cons

Steel case and bracelet make it noticeably heavier than resin models
Mineral crystal is less scratch-resistant than sapphire on pricier rivals
Bluetooth features depend on the Casio app and phone pairing
Analog hands and busy dial take longer to read at a glance than a digital G-Shock

Casio Men's G-Shock Black Dial Watch GSTB400D-1A prices at every store

WalmartNew
In stockSold by Zera MartReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$383.99+ $9.99 shippingChecked Nov 11
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What reviewers say

Owners of the GSTB400 line generally praise the metal build, the weighty feel and the set-and-forget accuracy from Bluetooth time sync. Common complaints are the heft on the wrist and the app pairing being fiddly at first.

What people mention

BuildPraisedOwners like the steel case and bracelet and say it feels sturdier than resin G-Shocks.
WeightCriticisedSome find the steel bracelet and case heavy for all-day wear.
TimekeepingPraisedBluetooth sync keeps it accurate without manual adjustment.
App pairingMixedSetup with the phone app works but can take a few tries.
LegibilityCriticisedThe busy analog dial is harder to read at a glance than a digital display.

About the Casio Men's G-Shock Black Dial Watch GSTB400D-1A

The Casio G-Shock GSTB400D-1A is a men's watch with a black dial. It has a stainless steel case and a stainless steel bracelet.

It runs on a quartz movement. The crystal is scratch-resistant mineral. The watch is water resistant up to 20 ATM, which is 200 meters or 660 feet.

Brand: Casio
Series: G-Shock
Model: GSTB400D-1A
Case material: Stainless steel
Bracelet: Stainless steel
Dial: Black
Movement: Quartz
Crystal: Scratch-resistant mineral
Water resistance: 20 ATM (200 meters / 660 feet)
Color: Silver

Specifications

color: SilverSource
actual_color: SilverSource

Questions and answers

Does it need a battery change?: It uses Tough Solar charging, so light keeps it running and routine battery swaps are not part of ownership.
Can I swim with it?: Yes. It is rated to 20 ATM, or 200 meters, which covers swimming and snorkeling but not scuba diving.
What does the Bluetooth link do?: It syncs the time with your phone automatically and can sound your phone when it is misplaced.
How does it compare with a resin G-Shock?: It looks dressier and feels more solid, but it is heavier and costs more than basic resin models.
Is the crystal sapphire?: No. It uses scratch-resistant mineral crystal, which is durable but softer than sapphire.
What is in the box?: The watch, its steel bracelet and Casio's documentation; the box contents follow Casio's standard packaging.
Where is the Casio Men's G-Shock Black Dial Watch GSTB400D-1A cheapest?: At Walmart, for $383.99, as of our latest check.
What do buyers say about the Casio Men's G-Shock Black Dial Watch GSTB400D-1A?: Rated 3 out of 5 from 6 ratings.