Introduction
This manual provides comprehensive instructions for the Armitron Sport Men's Digital Chronograph Resin Strap Watch, Model 40/8309RED. This watch features a quartz movement with a digital multifunctional display, designed for active lifestyles.

Figure 1: Front view of the Armitron Sport Digital Chronograph Watch, black with orange accents.
Key Features
- Digital Multifunctional Display: Provides clear time and function readouts.
- Chronograph with Alarm: Allows for precise timing and includes an audible alarm function.
- Lap Time: Record split times during chronograph operation.
- Dual Time: Display time for two different time zones simultaneously.
- Military Time: Option for 24-hour time format.
- Backlight Function: Illuminates the display for visibility in low-light conditions.
- Durable Construction: Features a 54mm resin case with an acrylic dial window and a textured resin band with a stainless steel buckle closure.
- Water Resistance: Water resistant to 100 meters (330 feet), suitable for swimming and snorkeling.
Setup
Before initial use, ensure the watch is set to the correct time and date. Refer to the operating instructions for detailed steps on setting various functions.
Setting Time and Date
- Press the MODE button (usually on the bottom left) repeatedly until the time setting mode is displayed (often indicated by flashing digits).
- Use the RESET button (top left) to select the digit to adjust (e.g., hours, minutes, year, month, day).
- Use the ST/STP button (top right) to increase the selected digit.
- Press MODE again to confirm settings and exit the time setting mode.

Figure 2: Side view illustrating watch buttons for setting and operation.
Operating Instructions
Chronograph Function
- To enter Chronograph mode, press the MODE button until "CHRONO" or a similar indicator appears.
- Press ST/STP to start and stop the chronograph.
- Press RESET to record lap times or to reset the chronograph to zero when stopped.
Alarm Function
- Navigate to Alarm mode using the MODE button.
- Use RESET and ST/STP to set the desired alarm time.
- Activate or deactivate the alarm using the appropriate button (refer to watch face labels, often ALARM CHIME or similar).
Backlight
Press the EL button (Electro-Luminescent) to illuminate the display for a few seconds. This feature is designed for low-light visibility.
Maintenance
Water Resistance
The Armitron Sport watch is water resistant to 100 meters (330 feet). This makes it suitable for swimming and snorkeling. However, it is not designed for scuba diving. Avoid pressing buttons while the watch is submerged to prevent water ingress.

Figure 3: Water Resistance Chart, indicating suitability for various water activities.
Battery Replacement
The watch is powered by 1 Lithium Metal battery (included). When the display becomes dim or stops functioning, the battery may need replacement. The back of the watch case is secured by screws, allowing for battery access. It is recommended to have battery replacement performed by a qualified watch technician to ensure water resistance is maintained.

Figure 4: Back view of the watch, showing the screw-secured case back for battery access.
Cleaning
Clean the watch case and strap with a soft, damp cloth. Avoid using harsh chemicals or abrasive materials, which can damage the resin and acrylic components.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or dim. | Low or dead battery. | Replace the battery (professional service recommended). |
| Buttons are unresponsive. | Watch may be in a locked mode or internal issue. | Try pressing all buttons to see if any respond. If not, a reset (if available) or professional inspection may be needed. |
| Time is incorrect. | Time not set correctly or battery issue. | Refer to "Setting Time and Date" section. If issue persists, consider battery replacement. |
Specifications
- Model Number: 40/8309RED
- Movement: Quartz
- Display Type: Digital
- Case Material: Resin
- Dial Window Material: Acrylic
- Band Material: Resin
- Water Resistance Depth: 100 Meters (330 Feet)
- Product Dimensions: 4.49 x 4.25 x 2.91 inches
- Item Weight: 8.82 ounces
- Battery: 1 Lithium Metal battery (included)
- Manufacturer: Armitron Sport
Warranty and Support
For warranty information, product support, or service inquiries, please refer to the official Armitron website or contact Armitron customer service directly. Keep your purchase receipt as proof of purchase for warranty claims.
You can visit the official Armitron store on Amazon for more information: Armitron Store





