G-SHOCK GMD-B300

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Like the GD-B500, the GMD-B300 is a compact and lightweight unisex watch with a step counter and Bluetooth smartphone link, but with a stylish 2100-inspired octagonal bezel like the larger G-SQUAD GBD-300. It has the similar functions as the GD-B500, including step-counting data with daily goal setting and progress display, dual time, stopwatch with 200-lap memory, countdown timer, 5 daily alarms, and auto LED backlight. A feature that the GD-B500 lacks is the interval timer featuring 5 time settings from 1 second to 60 minutes with auto repeat (up to 20) and auto start (5-second pre-count). Another advantage over the GD-B500 is the target time alarm for the stopwatch, which allows up to 10 target time settings with the watch beeping for 10 seconds when a target time is reached.
 

Bluetooth Step Counter

$120.00

List Price: $120

Size: Small
Dimensions (L x W x H): 46.4 x 43.8 x 12 mm
Weight: 41 grams
Module: 3567 (instruction manual at casio.com)
Battery (Lifespan): CR2016 (approx. 2 years)
Series Launch Year: 2024

Notable Features: Step Tracker, Bluetooth Mobile Link, 200-Lap Memory, Stopwatch Target Time Alarm, Interval Timer

See full specifications for GMD-B300-4 under “Additional information” tab above.

Suggested Uses: Fitness, Outdoors

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Recent GMD-B300 Releases:

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GMD-B300 Versus GD-B500 and GDB-300


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  • Description
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  • User Rating
  • Review
  • Specification
  • Size
  • Dimensions (L x W x H mm)
  • Weight (g)
  • Protection
  • Case Material
  • Bezel Material
  • Band Material
  • Glass
  • Battery
  • Battery Life (Approx.)
  • Power Saving
  • Low Battery Alert
  • Bluetooth
  • Sensors
  • Smartphone App
  • Bluetooth Functions
  • World Time
  • Stopwatch
  • Stopwatch Unit
  • Stopwatch Max Range
  • Measuring Modes
  • Countdown Timer
  • Countdown Timer Unit
  • Countdown Range
  • Countdown Setting Range
  • Countdown Setting Increment (Lowest)
  • Alarm
  • Hourly Time Signal
  • Light Type
  • Light Color
  • Calendar
  • Button Tone On/Off
  • 12/24-Hour Format
  • Compatible Band Size (mm)
  • Current Time Displayed In Other Modes
  • LCD Display Type
  • Vibration
  • Training Function
  • World Time Zones
  • World Time Cities
  • Daylight Saving Time
Some specs for individual models may differ within a series, such as price, materials, weight, etc. Specs are subject to change and are not guaranteed to be accurate here. Dollar prices are in U.S. currency unless otherwise noted. Click the link icons in the gallery images to view our articles on specific models. Gallery images labeled with "(casio.com)" are linked to an official Casio product page. Follow your country's official G-Shock site (gshock.casio.com) for specs on individual models and more release information.
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Specification: G-SHOCK GMD-B300

Size

Dimensions (L x W x H mm)

46.4 x 43.8 x 12

Weight (g)

41

Compatible Band Size (mm)

Protection

,

Case Material

Bezel Material

,

Band Material

Resin, Bio-Based Resin

Glass

Battery

CR2016

Battery Life (Approx.)

Low Battery Alert

Power Saving

Power Save

Bluetooth

Sensors

Smartphone App

Bluetooth Functions

Alarm Settings, Auto Summer Time (DST) Switching, Auto Time Correction, One-Touch Time Correction, Phone Finder, Step Count Data Transfer, Stopwatch Data Transfer, Time & Place Log, Timer Settings, World Time (approx. 300 cities)

World Time

Stopwatch

, ,

Stopwatch Unit

,

Stopwatch Max Range

Measuring Modes

elapsed time, lap times, split time

Countdown Timer

, , ,

Countdown Timer Unit

1 second

Countdown Range

Countdown Setting Range

Countdown Setting Increment (Lowest)

1 second

Alarm

Hourly Time Signal

Hourly Time Signal

Light Type

, , , ,

Light Color

White

Calendar

Full Auto Calendar to 2099

Button Tone On/Off

Button Tone On/Off

12/24-Hour Format

12/24-Hour Format

Current Time Displayed In Other Modes

, , ,

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