Casio G-SHOCK GD-400 Series Digital Watch

The Casio G-SHOCK GD-400 Series is built for active lifestyles with a rugged design inspired by street sports and urban fashion. Featuring distinctive face protectors that help shield the areas where the band joins the case, the watch offers enhanced durability while maintaining G-SHOCK's signature toughness. Equipped with shock-resistant construction, 200-meter water resistance, and a high-luminosity Super Illuminator LED backlight, the GD-400 Series ensures reliable performance and excellent readability in low-light conditions. Along with practical features such as Multi Time, World Time, stopwatch, countdown timer, alarms, and flash alerts, these watches combine bold styling with dependable everyday functionality. 

Key Features:

• G-SHOCK GD-400 Series 

• Digital display 

• Shock Resistant construction 

• Face protector design 

• 200-meter water resistance 

• Mineral Glass 

• Resin case and bezel 

• Resin Band 

• Super Illuminator LED backlight 

• Auto Light Switch 

• Selectable illumination duration 

• Afterglow 

• Flash Alert 

• Multi Time (4 different cities) 

• World Time (31 time zones, 48 cities + UTC) 

• 1/100-second Stopwatch 

• Countdown Timer 

• 5 Independent Alarms (One-time or Daily) 

• Hourly Time Signal 

• Full Auto Calendar (to year 2099) 

• Button operation tone On/Off 

• 12/24-hour time format 

• Approx. 3-year battery life 

• Easy to see in darkness 

• Sporty design 

• Casual design 

Technical Specification:

• Brand: Casio 

• Series: G-SHOCK GD-400 Series 

• Models Covered: GD-400-1B2, GD-400GB-1B2 

• Product Category: Digital Watch 

• Gender: Not specified on the official product pages 

• Case Size (L × W × H): 55 × 49.7 × 16.9 mm 

• Weight: 78 g 

• Case & Bezel Material: Resin 

• Band Material: Resin Band 

• Construction: Shock Resistant 

• Water Resistance: 200-meter water resistance 

• Glass Material: Mineral Glass 

• Compatible Band Size: 145–215 mm 

• Battery Type: CR2016 

• Battery Life: Approx. 3 years 

• Multi Time: 4 different cities 

• World Time: 31 time zones (48 cities + Coordinated Universal Time), daylight saving on/off, Home City/World Time city swapping 

• Stopwatch: 1/100-second stopwatch; measuring capacity 23:59'59.99"; elapsed time, split time, 1st–2nd place times 

• Countdown Timer: 1/10-second measuring unit; countdown range 24 hours; start time setting from 1 second to 24 hours (1-second, 1-minute, and 1-hour increments) 

• Alarms: 5 Independent Alarms (One-time or Daily) 

• Hourly Time Signal: Yes 

• Flash Alert: Flashes with buzzer for alarms, countdown timer completion, and hourly time signal 

• Light: LED Backlight (Super Illuminator) 

• LED Color: White 

• Light Features: Auto Light Switch, selectable illumination duration (1.5 or 3 seconds), afterglow 

• Calendar: Full Auto Calendar (to year 2099) 

• Mute Feature: Button operation tone On/Off 

• Accuracy: ±15 seconds per month 

• Time Format: 12/24-hour 

• Regular Timekeeping: Hour, minute, second, PM, month, date, day