Go aviation-inspired and mission-ready with the GRB300EC-1A — a bold GRAVITYMASTER engineered for precision, durability, and modern connectivity.
Built for demanding environments and inspired by the toughness of professional aviation gear, the GR-B300EC-1A combines a rugged Carbon Core Guard structure with a streamlined exterior and advanced flight-ready functionality. Equipped with Bluetooth Mobile Link and dual-time capabilities, this timepiece ensures accurate global timekeeping while delivering a powerful, tactical aesthetic. Lightweight yet incredibly durable, it’s designed for those who move with confidence on every mission.
Dial
Black analog-digital dial with aviation-inspired accents, bold indexes, and high-visibility display layout
Case Diameter (L × W × H) MM
59 × 54.7 × 15.7
Case Material
Resin / Carbon Core Guard structure
Bracelet
Resin band (Black)
Construction
Shock resistant, Carbon Core Guard structure
Power Supply and Battery Life
Tough Solar power system (solar powered)
Glass
Mineral glass
Gender
Men / Unisex
Water-Resistance
200-meter water resistance
World Time
Dual time display
38 time zones (38 cities + coordinated universal time), daylight saving on/off
Watch Features
Stopwatch
1-second stopwatch
Measuring capacity: 23:59'59
Flyback function included
Timer
Countdown timer
Measuring unit: 1 second
Countdown range: 24 hours
Alarm/Hourly Time Signal
5 daily alarms
Hourly time signal
Light
Double LED light (Super Illuminator)
Selectable illumination duration, 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 update)
Other Features
Mobile Link (Bluetooth connectivity for automatic time adjustment and settings)
Flight log memory
Phone finder
Hand shift feature
Power saving mode
Battery level indicator
12/24-hour format
Regular Timekeeping
Analog: Hour, minute, second hands
Digital: Date, day, world time, and function display
