Introduction
This manual provides comprehensive instructions for the operation and maintenance of your Armitron Sport Digital Chronograph Watch. Designed for durability and functionality, this watch features a digital display with time, date, and seconds, along with chronograph, alarm, dual time, and backlight functions. Its robust construction and water resistance make it suitable for various activities.

Front view of the Armitron Sport Digital Chronograph Watch, showcasing its digital display and button layout.
Setup and Initial Configuration
Battery Information
Your watch comes with a pre-installed LR44 battery. When the display dims or functions become erratic, it indicates a low battery. Battery replacement should ideally be performed by a qualified watch technician to ensure water resistance integrity.
Setting Time and Date
- Press the MODE button repeatedly until the time display begins to flash, indicating it is in setting mode.
- Use the RESET button to cycle through the settings (hours, minutes, seconds, month, day, day of week).
- Use the ST/STP button to adjust the flashing value.
- Once all settings are correct, press the MODE button again to exit the setting mode.

Side view of the watch, highlighting the function buttons.
Operating Instructions
Modes Overview
The watch features several modes accessible via the MODE button:
- Time Mode: Displays current time, day, and date.
- Alarm Mode: Set and activate daily alarms.
- Chronograph Mode: Use as a stopwatch for timing events.
- Dual Time Mode: Set and view a second time zone.
Using the Chronograph (Stopwatch)
- From Time Mode, press MODE until "CHRONO" or "STW" appears on the display.
- Press ST/STP to start the stopwatch.
- Press ST/STP again to pause the stopwatch.
- Press RESET to reset the stopwatch to zero.
- To record lap times, press RESET while the stopwatch is running. The lap time will display briefly, and the stopwatch will continue running in the background.
Setting and Activating the Alarm
- From Time Mode, press MODE until "ALARM" or "AL" appears.
- Press RESET to toggle the alarm on/off or to enter alarm setting mode.
- When setting, use ST/STP to adjust the hour and minute.
- Press MODE to confirm and exit.
Backlight Function
Press the EL button (Electro-Luminescent) to illuminate the display for approximately 3 seconds, allowing for visibility in low-light conditions.
Military Time (24-Hour Format)
In Time Mode, press the ST/STP button to toggle between 12-hour (AM/PM) and 24-hour (military) time formats.
Official Product Video
This video provides a 360-degree view of the Armitron Sport Unisex Digital Chronograph Watch, showcasing its design and features from all angles.
Maintenance and Care
To ensure the longevity and optimal performance of your Armitron Sport watch, follow these care guidelines:
- Cleaning: Wipe the watch case and strap regularly with a soft, damp cloth. For the nylon strap, mild soap and water can be used, ensuring it is thoroughly dried afterward.
- Avoid Chemicals: Do not expose the watch to strong chemicals, solvents, or detergents, as these can damage the case, strap, or internal components.
- Temperature Extremes: Avoid exposing the watch to extreme temperatures (hot or cold) for prolonged periods, as this can affect battery life and accuracy.
- Impact: While durable, avoid dropping the watch or subjecting it to severe impacts.

Rear view of the watch, showing the case back and strap attachment.
Water Resistance
This Armitron Sport watch is water resistant to 330 feet (100 meters). This rating means it is suitable for snorkeling and swimming. It is not recommended for scuba diving or high-impact water sports where water pressure might exceed the watch's rating.
Important: Do not operate the buttons while the watch is submerged in water, as this can compromise the water resistance seal.

Water Resistance Chart illustrating the capabilities of different water resistance ratings, with 100M (330FT) suitable for snorkeling.
Specifications
| Model Number | 40/8291BLK |
| Case Diameter | 41mm |
| Case Material | Resin |
| Strap Material | Nylon with hook and loop closure |
| Display Type | Digital LCD |
| Water Resistance | 100 Meters (330 Feet) |
| Functions | Time, Date, Seconds, Chronograph, Alarm, Lap Time, Dual Time, Backlight, Military Time |
| Battery | 1 x LR44 (included) |
| Product Dimensions | 4.09 x 3.78 x 2.91 inches |
| Item Weight | 4.16 ounces |

The watch as it appears on a wrist, demonstrating its fit and digital display.
Troubleshooting
If you encounter any issues with your watch, please refer to the following common solutions:
- Display is Blank or Dim: This usually indicates a low battery. Replace the LR44 battery.
- Buttons Not Responding: Ensure the watch is not in a locked mode (if applicable, though this model typically doesn't have one). If the issue persists, a battery reset (removing and reinserting the battery) might be necessary, but this should be done by a professional.
- Time is Inaccurate: Re-set the time following the "Setting Time and Date" instructions. If the watch consistently loses or gains time significantly, the battery may be weak, or the internal module may require servicing.
- Water Inside Display: If condensation or water appears inside the watch, immediately take it to a qualified watch repair center. This indicates a compromised water resistance seal.