Casio G-SHOCK G-STEEL GST-B400-1AJF Analog-Digital Watch
Casio G-SHOCK G-STEEL GST-B400-1AJF
The Casio G-SHOCK GST-B400-1AJF is a G-STEEL model from the GST-B400 series, combining an analog-digital display with Tough Solar power, Bluetooth connectivity, and Carbon Core Guard construction. The official Japanese reference is GST-B400-1AJF.
The watch features a stainless steel and resin case, mineral glass, and a black resin band. Its slim 12.9 mm profile is supported by a compact module and shock-resistant Carbon Core Guard structure. The watch connects to the CASIO WATCHES app for automatic time adjustment, world-time settings, reminders, Time & Place logging, and Phone Finder.
Additional functions include world time, a 1/100-second stopwatch, a 60-minute countdown timer, five daily alarms, double LED illumination, a full automatic calendar through 2099, hand-shift functionality, and power saving.
Key Features
Tough Solar power system
Module 5657
Bluetooth Mobile Link with CASIO WATCHES app
Carbon Core Guard shock-resistant construction
Stainless steel and resin case
Mineral glass
20-bar water resistance
World time, stopwatch, countdown timer, alarms, and full automatic calendar
Specifications
Specification | Details |
Brand | Casio |
Model / Reference | GST-B400-1AJF |
Collection / Series | G-SHOCK G-STEEL GST-B400 Series |
Movement | Casio Module 5657 |
Movement Type | Tough Solar analog-digital quartz |
Case Material | Resin and stainless steel |
Case Size | 46.6 × 49.6 × 12.9 mm |
Weight | 80 g |
Crystal | Mineral glass |
Bracelet / Strap | Black resin band |
Water Resistance | 20 bar / 200 m |
Functions | Bluetooth Mobile Link, world time with 38 cities plus UTC, 1/100-second stopwatch, 60-minute countdown timer, five daily alarms, hourly time signal, double LED light, full automatic calendar through 2099, hand shift, battery-level indicator, power saving |
Power Reserve | Approximately 7 months without further light; approximately 18 months with power saving enabled |
Accuracy | ±15 seconds per month without mobile-link correction |
Other | Carbon Core Guard structure; CASIO WATCHES app compatibility |
International Buyers – Import Duties Notice:
Be informed that import duties, taxes, and charges are not included in the item price or shipping cost. These are the buyer's responsibility.
All items are shipped via EMS Japan post or DHL fully insured signed for delivery. I wrap items very well and post very fast most items are posted within 3 days of purchase
Buy direct whatsapp me +817043701722
email me geoff10@mac.com
