The G-Shock GBA-900UU-3AER is engineered for active individuals and adventurers seeking a robust and connected timepiece. Its primary advantage is the seamless Bluetooth® link to your smartphone, enabling detailed tracking of distance and steps, and providing access to your activity history. Designed for durability in challenging environments, this watch offers exceptional performance, though users should note that its full GPS functionality initially leverages the connected smartphone, and the battery requires replacement approximately every two years.
Bluetooth® Connectivity: Links to your smartphone for auto time updates, phone notifications, simplified watch settings, and enhanced training management.
Fitness Tracking with GPS Link: Measures distance using an accelerometer, enhanced by linking with your smartphone's GPS. Once calibrated, it can measure distance independently. Also tracks steps and activity history via a smartphone app.
Super Illuminator Dial: Ensures the analogue-digital display is easy to read in any lighting conditions, including complete darkness.
200m Water Resistance: Suitable for swimming, snorkeling, and diving, making it a reliable companion for water sports and daily use.
Durable G-Shock Construction: Features a resilient 51mm green round case and a comfortable, ultra-soft green urethane resin strap with vent holes for improved fit and breathability.
Long Battery Life: Operates for up to two years before needing a battery replacement, minimizing maintenance.
Analogue-Digital Display: Provides the best of both worlds with traditional hands and digital readouts for various functions.
Multiple Functions: Includes a calendar (Day-Date), Stop Watch, Countdown timer, Dual Time display, and multiple alarms.
Exceptional G-Shock durability, built to withstand tough conditions.
Seamless smartphone connectivity via Bluetooth® for smart features and data tracking.
High level of water resistance (200m) suitable for diverse aquatic activities.
Clear and easy-to-read display in all conditions, thanks to Super Illuminator.
Comfortable and breathable soft urethane strap designed for extended wear.
Long-lasting battery life of up to two years, reducing frequent replacements.
Comprehensive suite of timekeeping and fitness functions.
Initial distance measurement and full GPS functionality rely on smartphone linkage.
Battery is not rechargeable and requires replacement after approximately two years.
The 51mm case size may be considered large or bulky for some wrist sizes.
Relies on a smartphone app for activity history review and detailed settings management.
Info needed: Specific limitations on app compatibility (e.g., OS versions).
Exceptional G-Shock durability, built to withstand tough conditions.
Seamless smartphone connectivity via Bluetooth® for smart features and data tracking.
High level of water resistance (200m) suitable for diverse aquatic activities.
Clear and easy-to-read display in all conditions, thanks to Super Illuminator.
Comfortable and breathable soft urethane strap designed for extended wear.
Long-lasting battery life of up to two years, reducing frequent replacements.
Comprehensive suite of timekeeping and fitness functions.
Initial distance measurement and full GPS functionality rely on smartphone linkage.
Battery is not rechargeable and requires replacement after approximately two years.
The 51mm case size may be considered large or bulky for some wrist sizes.
Relies on a smartphone app for activity history review and detailed settings management.
Info needed: Specific limitations on app compatibility (e.g., OS versions).
The G-Shock GBA-900UU-3AER is designed to be a reliable partner for an active lifestyle, excelling in both daily wear and demanding environments. Its robust G-Shock construction means it can easily endure impacts, vibrations, and extreme conditions, making it ideal for outdoor adventures, sports, or demanding jobs. The 200m water resistance ensures peace of mind during swimming, diving, or heavy rain, allowing you to focus on your activity without worrying about your watch.
For fitness enthusiasts, the Bluetooth® link to your smartphone transforms this timepiece into a capable fitness tracker. It uses the phone's GPS to accurately measure distance during runs or walks, and once calibrated, the watch can track distance independently using its accelerometer. This data, along with step counts, is then synced to a dedicated smartphone app, allowing you to review your activity history and track progress. This integration simplifies workout management and provides a clearer picture of your daily activity.
The Super Illuminator is a standout feature for practical use, ensuring the watch face is always legible, whether you're navigating a dimly lit trail at dawn or checking the time in a dark room. The combination of analogue hands and a digital display allows for quick glances at the time while providing detailed information like date, stopwatch, or dual time with ease. The soft urethane strap with vent holes enhances comfort during prolonged wear and intense activity by improving breathability and reducing sweat buildup, ensuring the watch stays securely and comfortably on your wrist.
Initial Power-On: Your watch should be ready to go out of the box. If not, ensure it's exposed to light (though this model primarily uses a battery, direct sunlight helps with initial internal charge stabilization in some G-Shocks).
Download the App: Search for the official Casio G-SHOCK app (often called G-SHOCK Connected or similar) on your smartphone's app store (iOS or Android).
Pair with Smartphone: Open the app and follow the on-screen instructions to pair your watch via Bluetooth®. You will typically need to put the watch into pairing mode by holding down a specific button (refer to the watch's quick start guide for exact button combinations).
Time Sync & Settings: Once paired, the watch will automatically adjust its time, and you can configure various settings like alarms, world time cities, and notification preferences directly through the app.
GPS Link for Distance Tracking: For initial distance tracking, ensure your phone's GPS is active and the watch is linked. This calibration allows the watch to measure distance more accurately even when not constantly connected to the phone's GPS.
Smartphone: Compatible with most iOS and Android smartphones that support Bluetooth® Low Energy. Ensure your phone's operating system is up-to-date for optimal performance.
App: Requires the official G-SHOCK Connected app from Casio for full functionality, including activity history and simplified settings management.
Cleaning: Regularly wipe the watch case and strap with a soft, damp cloth to remove dirt, sweat, and oils. For stubborn grime, a mild soap solution can be used, ensuring to rinse thoroughly.
Water Exposure: While 200m water resistant, avoid operating buttons underwater unless specifically designed for it (this model allows it). After exposure to saltwater, rinse the watch with fresh water to prevent salt buildup and corrosion.
Temperature Extremes: Avoid exposing the watch to extreme temperatures (very hot or very cold) for prolonged periods, as this can affect battery life and internal components.
Battery Replacement: The battery has an estimated life of two years. When replacement is needed, it is recommended to have it done by a qualified watch technician to ensure the water resistance seal is properly maintained.
Strap Maintenance: The soft urethane strap is durable but can degrade over time with excessive exposure to chemicals (e.g., solvents, detergents) or prolonged direct sunlight. Clean it regularly and inspect for signs of wear.