Introduction
This manual provides essential instructions for the proper use and maintenance of your CASIO GBA-950 G-SHOCK watch. Designed for urban sports and daily training, this analog-digital timepiece features Bluetooth connectivity, a stopwatch, countdown timer, dual time, and an alarm function. Please read this manual thoroughly to ensure optimal performance and longevity of your watch.

Image: Front view of the CASIO GBA-950 G-SHOCK watch, highlighting its analog hands and digital display.
Setup
1. Initial Time Setting
Your GBA-950 watch can be set manually or synchronized via Bluetooth with your smartphone for accurate timekeeping. For initial setup, it is recommended to use the Bluetooth connection.
2. Bluetooth Pairing
- Download the official G-SHOCK Connected app on your smartphone.
- Enable Bluetooth on your smartphone.
- On the watch, press and hold the MODE button (usually bottom left) until the Bluetooth indicator appears on the digital display.
- Open the G-SHOCK Connected app and follow the on-screen instructions to pair your watch.
- Once paired, the watch will automatically adjust its time and date settings.

Image: The CASIO GBA-950 watch displayed alongside a smartphone screen showing the G-SHOCK Connected application, illustrating the Bluetooth pairing process.
Operating Instructions
1. Mode Navigation
Press the MODE button (bottom left) to cycle through different functions: Timekeeping, Stopwatch, Countdown Timer, Alarm, Dual Time, and Step Tracker.
2. Timekeeping Mode
- The analog hands display the current time.
- The digital display shows the date, day of the week, and seconds.
- To adjust time manually, refer to the detailed instructions in the full user manual available online.
3. Stopwatch Function
- Navigate to the Stopwatch mode using the MODE button.
- Press the START button (bottom right) to begin timing.
- Press START again to stop.
- Press the LAP button (top right) to record lap times.
4. Step Tracker
The GBA-950 includes a step tracker to monitor your daily activity. The digital display will show your current step count. An indicator on the watch face (often marked MAX/MIN) may show your progress towards a daily step goal.

Image: Detailed view of the CASIO GBA-950 watch face, highlighting the step tracker's progress indicator.
5. Illumination
Press the LIGHT button (top left, often labeled DISP) to illuminate the watch face for visibility in low-light conditions. The analog hands and hour markers feature a luminous coating for enhanced readability.

Image: The CASIO GBA-950 watch face with its luminous hands and hour markers glowing brightly in a dark environment.
Maintenance
1. Water Resistance
The GBA-950 is water-resistant up to 20 bars (200 meters). This means it is suitable for showering, swimming, and shallow diving. Do not operate buttons while the watch is submerged in water. Avoid exposing the watch to hot water or steam, as this can compromise the seals.
2. Cleaning
Wipe the watch regularly with a soft, dry cloth to remove dirt and moisture. For stubborn grime, use a mild soap solution and a soft brush, then rinse thoroughly with fresh water and dry completely. Avoid using chemical cleaners or solvents.
3. Battery Replacement
The watch is powered by a quartz movement, requiring a specific watch battery. When the battery runs low, the display may dim or functions may become erratic. It is recommended to have the battery replaced by an authorized CASIO service center to ensure proper sealing and water resistance.

Image: An exploded diagram of the CASIO GBA-950 watch, showing its individual components such as the case, strap, and internal structure, useful for understanding maintenance.
Troubleshooting
- Bluetooth Synchronization Issues: If the watch fails to sync with your smartphone, ensure Bluetooth is enabled on both devices and the G-SHOCK Connected app is running. Try restarting both the watch (by removing and reinserting the battery, if accessible, or performing a factory reset if available) and your phone. Re-pair the devices if necessary.
- Digital Display Readability: The negative digital display on this model can be challenging to read in certain lighting conditions, particularly indoors. Ensure adequate lighting when attempting to read the digital display. The analog hands and luminous markers are designed for primary time reading.
- Incorrect Time/Date: If the time or date is incorrect, attempt to re-sync with the G-SHOCK Connected app. If the issue persists, manually adjust the time and date settings as per the full user manual.
Specifications
| Model Number | GBA-950-1AER |
| Brand | Casio |
| Movement Type | Quartz |
| Display Format | Analog-Digital |
| Case Material | Resin |
| Strap Material | Resin |
| Water Resistance | 20 Bar (200 Meters) |
| Case Diameter | 48 mm |
| Case Thickness | 15 mm |
| Weight | 52 g |
| Special Features | Shock Resistant, Bluetooth, Step Tracker, Stopwatch, Countdown Timer, Dual Time, Alarm |

Image: The back of the CASIO GBA-950 G-SHOCK watch, displaying the stainless steel case back with engraved model number and water resistance information.
Warranty and Support
1. Warranty Information
Your CASIO GBA-950 watch comes with a 2-year manufacturer's warranty. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims. The warranty does not cover damage resulting from misuse, accidents, unauthorized repairs, or normal wear and tear.
2. Customer Support
For further assistance, detailed operating instructions, or service inquiries, please visit the official Casio website or contact your local authorized Casio service center. A comprehensive user manual in PDF format is also available for download from the official Casio support page or via the link provided with your purchase.
You can find the official user manual here.