G-Shock Black G-Steel Watch

Revel in eclectic sophistication with the G-STEEL fusion of metal and resin components in a popular all-black G-SHOCK.

Tough construction meets stylish design in a black ion-plated metal bezel set against a base of jet black. With its slim combination module and Carbon Core Guard structure, the black-on-black take of the GST-B400 is a cool fashion statement ready for whatever you are.

Case size (Lx Wx H): 46.6 x 49.6 x 12.9 mm
Weight: 80 g

Case and bezel material: Case / bezel material: Resin / Stainless steel
Band: Resin Band

Construction: Shock Resistant Carbon Core Guard structure

Water resistance:200-meter water resistance

Power supply and battery life: Tough Solar (Solar powered)

Smartphone Link feature
Mobile link (Wireless linking using Bluetooth)
Apps: CASIO WATCHES - Available App Store and Google Play 

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

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

Timer: Countdown timer
Measuring unit: 1 second Countdown range: 60 minutes
Countdown start time setting range: 1 second to 60 minutes (1-second increments and 1-minute increments)

Alarm/hourly time signal: 5 daily alarms, Hourly time signal

Light: 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)
Light colour: LED:White

Calendar: Full auto-calendar (to year 2099)

Mute feature: Button operation tone on/off

Energy saving feature: Power Saving (display goes blank to save power when the watch is left in the dark)

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)

Accuracy: Accuracy: +/-15 seconds per month (with no mobile link function)

12/24-hour format

Date/month display swapping

Day display (days of the week selectable in six languages)Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)

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

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

GSTB400BB-1A G-Shock Black G-Steel Watch