Casio G-Shock for Ladies' GMD-B300 Lineup G-SQUAD Bluetooth¶¸ Dual Time Bio-Based Watch GMDB300-1D GMD-B300-1D GMD-B300-1

The ideal companion for your active everyday — a sports-oriented G-SHOCK with step tracker delivers handy support for your healthy, active lifestyle. 

Start walking and the motion-sensing accelerometer counts your steps automatically. The watch displays total daily steps as well as progress toward goals. Tracked data sent to a dedicated app helps you easily manage life log data.

Indulge in natural hues that add a touch of color to daily life. Matte textures pair with light accent colors to produce color block designs, and the dial features a sportswear fabric pattern to perfectly accent your effortless casual style.

Key resin components of the case, bezel, band, and more are made with bio-based resin. Produced using renewable organic resources, this material is expected to help reduce environmental impact.

Case / bezel material: Resin / Bio-based resin
Bio-based resin band
Shock Resistant
Mineral Glass
200-meter water resistance
LED backlight (Super Illuminator)
Auto light switch, selectable illumination duration (1.5 seconds or 3 seconds), afterglow
LED:White
Mobile link (Wireless linking using Bluetooth®)
Time adjustment
Bluetooth: Connects to a smartphone and automatically adjusts the time
Step count display range : 0 to 999,999 steps 
Step goal progress display (step count goal setting range: 1,000 to 50,000, 1,000-step increments)
Step count graph（Hourly step count for the past 7 hours on a 6-level graph）
Step indicator
Power Saving on/off
Dual time (Home time swapping)
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)
Recorded data: Up to 200 records (measurement start month, date, hour, minute, lap/split times)
Target Time alarm up to 10 Target Time settings
Countdown timer
Timer for interval measurement (up to five time settings)
Measuring unit: 1 second
Input range: 00'00" to 60'00" (1-second increments and 1-minute increments)
Others: Auto-repeat (number of repeats settable from 1 to 20), auto-start
5 daily alarms
Hourly time signal
Full auto-calendar (to year 2099)
12/24-hour format
Button operation tone on/off
Low battery alert
Regular timekeeping: Hour, minute, second, pm, year, month, date, day
Accuracy: ±15 seconds per month (with no mobile link function)
Approx. battery life: 2 years on CR2016
Size of case : 46.4 × 43.8 × 12 mm
Total weight : 41 g