The G-SHOCK GSTB400-1A from the G-STEEL GST-B400 collection is built for men who want toughness with refined style. It features a 46.6 × 49.6 × 12.9 mm case crafted from Resin / Stainless steel, matched to a Stainless steel and Resin band. The dial/display is Black, delivering crisp legibility in all conditions. Timekeeping is handled by a Tough Solar, Bluetooth system for dependable accuracy and everyday convenience. Water resistance is rated to 200 m, so it’s ready for swimming and harsh weather. Key features: Slim case; World time; Stopwatch; Timer; 5 alarms; Double LED light. As with every G‑SHOCK, you also get the signature shock‑resistant construction and rugged reliability for years of worry‑free wear. G‑SHOCK engineering blends resilient materials with thoughtful ergonomics, from the protective bezel architecture to the comfortable strap. Sapphire or mineral crystals, high‑brightness illumination and intuitive controls make these watches easy to live with day to day. Whether you’re training, traveling or tackling the workweek, this model balances performance, practicality and distinctive design so it feels as capable as it looks.
| Base material |
Stainless steel |
| Brand |
G-SHOCK |
| Brand collection |
G-STEEL (GST-B400) |
| Product category |
Watches |
| Target audience |
men |
| Watch band material |
Resin |
| Watch bezel type |
Stainless steel |
| Watch case material |
Resin / Stainless steel |
| Watch case size |
46.6 × 49.6 × 12.9 mm |
| Watch dial color |
Black |
| Watch features |
Slim case; World time; Stopwatch; Timer; 5 alarms; Double LED light |
| Watch movement type |
Tough Solar, Bluetooth |
| Watch water resistance |
200 m |
