Casio GWR-B3000B-8AJF Quartz G-shock MASTER OF G - AIR GRAVITYMASTER solar radio stop watch 2026.7 release

Release Date: July 2026

Case Dimensions (H × W × D): 56.7 × 47.3 × 14.1 mm

Weight: 102 g

Case/Bezel Material: Carbon fiber reinforced resin (biomass plastic) / Stainless steel

Strap: Soft polyurethane strap (biomass resin)

Construction: Triple protection (shock-resistant structure, centrifugal force resistance, vibration-resistant structure); Carbon fiber core protection structure

Water Resistance: 200m water resistance

Time Calibration: Compatible with radio-controlled watches from Japan, North America, Europe, and China (six-band radio wave reception); Bluetooth automatic time calibration upon smartphone connection

Power/Battery Life: Solar charging (solar charging system)

Mobile Connectivity: Connects to compatible phones via Bluetooth

Compatible Apps: Compatible with "CASIO" and "WATCHES" apps

App Connectivity Features: Automatic time calibration, easy watch setup, world time (approx. 300 cities), flight log, phone finder

Crystal: Spherical/curved glass; Anti-reflective sapphire crystal

Crown: Screw-down crown

Surface Finish: Grey IP (bezel)

Strap Size Range: 145–215 mm

Other Features: Luminous coating

World Time: Displays 26 cities worldwide (38 time zones, with daylight saving time setting), local city switching function, UTC direct dial function (time zones can be updated via smartphone connection)

Stopwatch: 1-second precision, 24-hour format

Timer: Setting unit: 1 minute, maximum setting time: 24 hours, increments of 1 second

Alarm: Time alarm

Illumination: LED illumination (high brightness with afterglow function); Light color: White

Calendar: Auto calendar

Automatic Hand Position Correction Function: With shock resistance

Power Saving Function: In dark environments, the hands will stop moving after a period of time to conserve power

Battery Level Display/Warning: Yes

Accuracy: If no standard radio waves are received or the watch is not connected to a smartphone, it operates with standard quartz watch accuracy (average monthly error ±15 seconds)

Other: Date and day of the week display, magnetic field detection function

Time Correction Details:

Radio wave reception function: Automatic reception (up to 6 times per day, up to 5 times per day for Chinese radio waves)

Receiving radio wave: JJY, Frequency: 40kHz/60kHz (Compatible with Fukushima and Kyushu stations)

Receiving radio wave: WWVB, Frequency: 60kHz

Receiving radio wave: MSF/DCF77, Frequency: 60kHz/77.5kHz

Receiving radio wave: BPC, Frequency: 68.5kHz

When the local time is set to a time zone that can receive standard radio waves, the watch will receive signals from the corresponding radio stations in that time zone

Supported Cities (and Corresponding Radio Waves):

Tokyo / Japanese radio waves JJY40/JJY60