Go bold with the GR-B300-8A2 — where aviation design meets advanced toughness.
Inspired by the world of aviation, the GR-B300-8A2 features a sleek grey finish with bold blue accents for a dynamic, cockpit-ready look. Built with Carbon Core Guard structure and equipped with Bluetooth® connectivity and Tough Solar power, it delivers precision, durability, and smart functionality. Designed for those who demand performance and style, this model combines professional-grade features with the rugged reliability of G-SHOCK.
Dial: Grey dial with blue accents and multi-layered analog-digital display
Case Diameter (L × W × H) MM: 59 × 54.7 × 15.7
Case Material: Carbon / Resin
Bracelet: Resin band (Grey with blue accents)
Construction: Shock resistant, Carbon Core Guard structure
Power supply and battery life: Tough Solar (solar powered)
Glass: Mineral glass
Gender: Men / Unisex
Water-Resistance: 200-meter water resistance
Smart Features
Bluetooth® connectivity (connects to smartphone via CASIO WATCHES app)
Auto time adjustment
Easy watch settings via app
World time (300+ cities via app)
Flight log memory
Phone finder
World Time
38 time zones (38 cities + coordinated universal time), daylight saving on/off, auto summer time (DST) switching
Watch Features
Stopwatch:
1/100-second stopwatch
Measuring capacity: 23:59'59
Measuring modes: Elapsed time, split time
Timer:
Countdown timer
Measuring unit: 1 second
Countdown range: 60 minutes
Countdown start time setting range: 1 minute to 60 minutes (1-minute increments)
Alarm/hourly time signal:
Daily alarm
Hourly time signal
Light
Double LED light (Super Illuminator)
Selectable illumination duration (1.5 seconds or 3 seconds), afterglow
Light color: LED: White
Calendar: Full auto-calendar (to year 2099)
Mute feature: Button operation tone on/off
Accuracy: ±15 seconds per month (without mobile link)
Other features:
Hand shift feature
Battery level indicator
Airplane mode
12/24-hour format
Regular timekeeping:
Analog: 2 hands (hour, minute), 1 hand (mode)
Digital: Hour, minute, second, pm, month, date, day
