World time
38 time zones (26 cities* , auto summer time (DST) switching), UTC time display, home city swapping, One-touch UTC display
* Subject to updates by connection between the watch and a phone.
Stopwatch
1-second stopwatch
Measuring capacity: 23:59'59
Timer
Countdown timer
Measuring unit: 1 second
Countdown range: 24 hours
Countdown start time setting range: 1 minute to 24 hours (1-second increments)
Alarm/hourly time signal
Daily alarm
Light
LED light (Super Illuminator)
Afterglow
Light color
LED:White
Calendar
Full auto-calendar (to year 2099)
Hand home position correction feature
The auto hand home position correction (with Shock Detection)
Energy saving feature
Power Saving (hands stop to save power when the watch is left in the dark)
Battery display/alert
Battery level indicator
Run time
Approx. battery operating time:
5 months on rechargeable battery (operation period with normal use without exposure to light after charge)
22 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
Accuracy: ±15 seconds per month (with no signal calibration and mobile link function)
Regular timekeeping:
Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 3 dials (dual time hour and minute, dual time 24-hour, day)
Day indicator
Date display
Magnetic field detection
Time adjustment details
Time calibration signal reception
Auto receive up to six* times a day (remaining auto receives canceled as soon as one is successful)
*5 times a day for the Chinese calibration signal
Manual receive
The latest signal reception results
Time Calibration Signals
Station name: DCF77 (Mainflingen, Germany)
Frequency: 77.5 kHz
Station name: MSF (Anthorn, England)
Frequency: 60.0 kHz
Station name: WWVB (Fort Collins, United States)
Frequency: 60.0 kHz
Station name: JJY (Fukushima, Fukuoka/Saga, Japan)
Frequency: 40.0 kHz (Fukushima) / 60.0 kHz (Fukuoka/Saga)
Station name: BPC (Shangqiu City, Henan Province, China)
Frequency: 68.5 kHz
Spherical Glass
Sapphire crystal with anti-reflective coating
Screw Lock Crown
Surface treatment
Gray ion plated bezel
Neobrite
Smartphone Link feature
Mobile link (Wireless linking using Bluetooth®)
Apps
CASIO WATCHES
App connectivity feature
Auto time adjustment
Easy watch setting
Approximately 300 world time cities
Flight log
Phone finder
Case and bezel material - Bio-based Carbon / Stainless steel
Soft urethane band (Bio-based resin)
Shock Resistant
TRIPLE G RESIST (Shock resistant, Centrifugal force resistant, Vibration resistant)
Carbon Core Guard structure
200-meter water resistance
Time adjustment
Radio-controlled Watch; Multi band 6
Bluetooth: Connects to a smartphone and automatically adjusts the time
Tough Solar (Solar powered)
Case size (L× W× H)
56.7 × 47.3 × 14.1 mm
Weight
102 g

G-Shock Gravitymaster - GWR-B3000B-8AJF