Casio to Release a More Compact G-SHOCK Sports Watch for the G-SQUAD Series

Smaller Size for a Wider Range of Users

September 11, 2019


Tokyo, September 11, 2019 — Casio Computer Co., Ltd. announced today the release of new additions to its G-SQUAD lineup of watches, which are part of the G-SHOCK brand of shock-resistant watches. G-SQUAD watches, designed for people who work out daily, are equipped with a step counter and interval timer. The new GMA-B800 is even more compact and comfortable to wear.

The GMA-B800 is equipped with functions useful for daily health management and workouts. It was created by downscaling the analog model GBA-800, popular for its simple one-tone color design, so that it can be worn by a wider range of people. Since the case width has been reduced by 3.4mm, down to 45.2mm, it is ideal for those who want a compact G-SHOCK design, or for someone who wants the other half of a “couple’s set” to pair with the GBA-800.

In addition to gray and yellow—which go well with athletic clothing styles and are two popular colors for the GBA-800—black and white options have been added, providing four color choices for the GMA-B800. The black and the white models are finished using eye-catching rose gold accents on the hands, index marks, and watchband.

As with previous models, a triple-axis accelerometer measures the number of steps the wearer takes per day, as well as the walking or running pace, and the step count is shown on the watch face. By linking the GMA-B800 to a smartphone via Bluetooth®, the user can check their daily steps and calories burned using a dedicated app: G-SHOCK Connected. In addition, the app supports daily health management by classifying exercise intensity into five levels, using the step count and walking / running pace data measured by the watch. The step count results are then broken down according to intensity level, and displayed on a graph.


Main app features (Smartphone Link)

■ Step Tracker

The Step Tracker feature shows the number of steps and calories burned. The calendar shows results at a glance, while step counts are graphed by intensity level for one day, one week, and one month. The map shows the step count and calories burned for each selected map area.

Calories / step count display
Results at a glance using a calendar
Upper screen: Results by map area Lower screen: Graph of step counts by intensity level
  • App screen may differ in official release.

■ Timer

With the Timer feature, up to 20 sets of five timers can be configured. Workouts with timers for interval training can also be created.

Timer setting screen
Workout creation screen
  • App screen may differ in official release.

■ View a list of stopwatch results and set time targets

■ Automatically corrects the home and world time, including adjusting for daylight savings, four times per day.

■ Easily set the dual time display choosing from among some 300 cities in the world from the app.

■ Phone Finder function enables a mobile phone alarm to be activated by pressing a watch button.

■ Easily set time, including alarms, adjusting hand positions, time swapping, and more.

GBA-800 (released February, 2018)
GBA-800 (released February, 2018)
GBA-800 (released February, 2018)


Water Resistance
200 meters
Communication Specifications
Communication Standard
Bluetooth® low energy*1
Signal Range
Up to 2 meters (may differ depending on surrounding conditions)
Step Counter
Step Count display (0 to 999,999), Step Goal Progress display (in 5-percentage-point increments / step count goal setting range: 1,000 to 50,000, 1,000-step increments), Step Count Graph (hourly step count for the past 11 hours on a 6-level graph), Step Indicator, power saving (auto sensor sleep-mode entry after fixed period of non-activity)
1/100 second (up to 60 minutes) / 1 second (60 minutes or more); measuring capacity: 59’59”99 (for the first 60 minutes), 1:00’00 to 23:59’59 (after 60 minutes); measuring modes: elapsed time, lap times; lap/split time switching; 200 measurement data set recording (measurement start month, date, and lap/split times); target time alarm function (up to 10 alarms, measuring unit: 1 second, time setting range: 23 hours 59 minutes 59 seconds)
Countdown Timer
Interval measurement (up to 5 timers); measuring unit: 1 second; countdown range: 60 minutes; countdown start time setting range: 1 second to 60 minutes; auto repeat (up to 20 times); auto start; progress beeper
5 daily alarms; hourly time signal
Other Functions
Mobile Link functions (wireless linking using Bluetooth®), dual time (home time swapping), full auto-calendar, 12/24-hour format, button operation tone on/off, double LED light (LED light for the face/ LED backlight for the digital display, Super Illuminator, auto light; afterglow with selectable illumination duration: 1.5 seconds or 3 seconds), hand shift feature
Accuracy at Normal Temperature
±15 seconds per month (without linking to a mobile phone)
Battery Life
Approx. 2 years on CR2016
Size of Case
50.7×45.2×15.5 mm
Total Weight
Approx. 52g
  • *1 The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Casio Computer Co., Ltd. is under license.