Armitron 40/8309BLU
Armitron Sport Men's Digital Chronograph Resin Strap Watch
Model: 40/8309BLU | Brand: Armitron
Product Overview
The Armitron Sport 40/8309BLU is a robust digital chronograph watch designed for active lifestyles. It features a quartz movement with a multifunctional digital display, housed in a metallic grey resin case with a black top ring and blue accents. The watch is equipped with a durable black resin strap and offers various timekeeping functions.

Front view of the Armitron Sport 40/8309BLU Digital Chronograph Watch, showcasing its black resin case, blue accents, and digital display.
Key Features
- Digital Multifunctional Display: Provides clear readouts for time, seconds, day, and date.
- Chronograph: Stopwatch function for precise time measurement.
- Lap Time: Allows recording of lap times during chronograph operation.
- Alarm: Programmable alarm function.
- Dual Time: Displays time for two different time zones simultaneously.
- Military Time (24-hour format): Option to display time in 24-hour format.
- Backlight: Illuminates the display for visibility in low-light conditions.
- Water Resistance: Rated to 100 meters (330 feet), suitable for swimming and snorkeling.
- Durable Construction: Metallic grey resin case, black top ring, and black resin strap.
Setup Guide
Setting Time and Date
- Press the MODE button (bottom left) repeatedly until the time setting mode is displayed (usually indicated by flashing digits).
- Use the RESET button (top left) to select the digit or setting you wish to adjust (e.g., hours, minutes, year, month, day).
- Use the ST/STP button (top right) to increase the selected value. Hold to rapidly advance.
- Once all settings are correct, press the MODE button to exit the setting mode.
Setting the Alarm
- Press the MODE button until the alarm setting mode is displayed.
- Use the RESET button to select hours or minutes.
- Use the ST/STP button to adjust the alarm time.
- Press the MODE button to confirm and exit.
- To activate/deactivate the alarm, press the ALARM CHIME button (middle left) in normal time mode.
Operating Instructions
Using the Chronograph (Stopwatch)
- Press the MODE button until the chronograph mode is displayed (usually indicated by "CHRONO" or "STW").
- Press the ST/STP button to start the stopwatch.
- Press ST/STP again to pause/resume.
- To record a lap time, press the RESET button while the stopwatch is running. The lap time will display briefly.
- To reset the stopwatch to zero, ensure it is paused, then press the RESET button.
Dual Time Function
The dual time feature allows you to track a second time zone. To access and set it:
- Press the MODE button until the dual time mode is displayed.
- Use the RESET and ST/STP buttons to set the second time zone, similar to setting the main time.
Backlight Operation
To illuminate the display in dark conditions, press the EL button (bottom right). The backlight will typically stay on for a few seconds.

The Armitron Sport watch worn on a wrist, showing the digital display and overall size.

Side view of the watch on a wrist, demonstrating its profile and how it fits under a sleeve.
Maintenance
General Care
- Clean the watch regularly with a soft, damp cloth. Avoid harsh chemicals or abrasive materials.
- Rinse the watch with fresh water after exposure to salt water or chlorine.
- Avoid exposing the watch to extreme temperatures or direct sunlight for prolonged periods.
Battery Replacement
The watch uses a Lithium Metal battery. When the display fades or stops functioning, the battery needs replacement. The back case is secured with screws, allowing for user replacement. It is recommended to have the battery replaced by a qualified watch technician to ensure water resistance is maintained.

The Armitron Sport watch presented in its original packaging, a black and white box.
Troubleshooting
- Display is blank or dim: The battery may need replacement.
- Buttons are unresponsive: Ensure the watch is not in a locked mode (if applicable, refer to specific model instructions for lock features). If issues persist, a soft reset (removing and reinserting battery) might be necessary, but this should be done by a professional to preserve water resistance.
- Time is inaccurate: Re-set the time according to the "Setting Time and Date" instructions. If inaccuracy persists, the watch module may require servicing.
Specifications
| Feature | Detail |
|---|---|
| Model Number | 40/8309BLU |
| Movement | Quartz |
| Display Type | Digital |
| Case Material | Resin |
| Case Diameter | 54mm |
| Strap Material | Resin |
| Water Resistance | 100m (330ft) |
| Battery Type | Lithium Metal (included) |
| Country of Origin | China |
Water Resistance Guidelines
The Armitron Sport 40/8309BLU is water resistant to 100 meters (330 feet). This rating indicates suitability for various water activities, but it is important to understand the limitations:
| Rating | Suitability |
|---|---|
| Not Water Resistant | No protection against water. |
| Accidental Splashes | Withstands splashes or brief immersion, not suitable for swimming or bathing. |
| Water Resistant to 30M (100FT) | Withstands splashes or brief immersion, not suitable for swimming or bathing. |
| Water Resistant to 50M (165FT) | Suitable for short periods of recreational swimming, but not diving or snorkeling. |
| Water Resistant to 100M (330FT) | Suitable for swimming and snorkeling, but not scuba diving. |

Official water resistance chart, highlighting the 100M (330FT) rating for swimming and snorkeling.
Official Product Video
This video provides an overview of the Armitron Sport Men's 40/8309BLU Digital Chronograph Watch, showcasing its features and design. It highlights the watch's blue accents and black resin strap.
Warranty and Support
Armitron watches typically come with a limited warranty covering manufacturing defects. For specific warranty details, claims, or technical support, please refer to the warranty card included with your purchase or visit the official Armitron website. Keep your proof of purchase for warranty validation.
For further assistance, you may contact Armitron customer service through their official channels.
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