Casio GST-B400D-1ADR

Features

An ultra-thin module encased in carbon fiber makes for a stylish G-STEEL timepiece with the slimmest profile yet.

Strong, yet lightweight, the carbon core guard structure absorbs external shocks and retains Bluetooth connectivity and solar power functionality even with smaller components and a thinner module. Measuring just 12.9mm from the back of the case to the top of the bezel, the GST-B400 is over a millimeter thinner than its predecessor.

Your choice of four distinctive styles—the simplicity of a silver metal band and silver case; light silver case set against dark resin band; dial in dramatic red vapor deposition finish paired with a black ion-plated bezel; or dial in bold blue vapor deposition finish with black ion-plated bezel and band. With top bezels treated with five different finishes and middle bezels treated with four, these G-STEEL timepieces deliver exceptional metal textures from every angle.

* Slimmest profile as of December 2020

Specifications

• Case/bezel material: Resin/Stainless steel
• Stainless Steel Band
• Solid Band
• One-touch 3-fold Clasp
• Tough Solar (Solar powered)
• Mobile link (Wireless linking using Bluetooth®)
• 200-meter water resistance
• Shock Resistant
• Carbon Core Guard structure
• Double LED light
• LED 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)
• 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 swapping

• Mineral Glass
• Screw Lock Back
• Neobrite
• Mute Feature: Button operation tone on/off

• 5 daily alarms
• Hourly time signal
• Stopwatch: 1/100-second stopwatch Measuring capacity: 00’00”00~59’59”99 (for the first 60 minutes) 1:00’00~23:59’59 (after 60 minutes) Measuring unit: 1/100 second (for the first 60 minutes) 1 second (after 60 minutes) Measuring modes: Elapsed time, lap/split time

• 12/24-hour format
• Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
• Date/month display swapping
• Battery display/alert: Battery level indicator
• Run time: Approx. battery operating time: 7 months on rechargeable battery (operation period with normal use without exposure to light after charge) 18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
• Apps: CASIO WATCHES
• Regular timekeeping:

Analog:2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (battery level, mode)

Digital: Hour, minute, second, pm, month, date

• Full auto-calendar (to the year 2099)
• Countdown timer:
• Measuring unit: 1 second
• Countdown range: 24 hours

Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments, and 1-hour increments)

• Accuracy: ±15 seconds per month

Size of case / Total weight

• Size of case: 46.6 × 49.6 × 12.9 mm
• Total weight: 160 g