Introduction
This manual provides comprehensive instructions for the operation and maintenance of your Timex Marathon Digital Watch, model TW5K84900M6. Please read this manual thoroughly to ensure proper use and to maximize the lifespan of your watch.

Image: Front view of the Timex Marathon Digital Watch, model TW5K84900M6, featuring a black resin case, yellow accents, and a digital display showing time, day, and date.
Setup
1. Initial Battery Activation
Your watch comes with a pre-installed lithium metal battery. If the display is blank, gently press any button to activate it. If it remains blank, refer to the Troubleshooting section.
2. Setting Time and Date
- Press the MODE button repeatedly until the time setting mode is displayed (usually indicated by flashing digits).
- Use the ST/STP button to adjust the flashing digit (hours, minutes, seconds).
- Use the RESET button to move to the next setting (e.g., from hours to minutes).
- Continue adjusting and moving until the correct time and date (month, day, year) are set.
- Press the MODE button to exit the setting mode.
3. Alarm Setting
- Press the MODE button until the alarm mode is displayed (often indicated by an alarm icon).
- Use the ST/STP button to adjust the alarm hour.
- Use the RESET button to move to the alarm minute setting.
- Use the ST/STP button to adjust the alarm minute.
- Press the MODE button to save the alarm setting and exit.
- To activate/deactivate the alarm, press the RESET button while in alarm mode. An alarm icon will appear/disappear.
Operating Instructions
1. Time Display
The default display shows the current time, day of the week, and date. Press the LIGHT button to illuminate the display in low-light conditions.
2. Stopwatch Function
- Press the MODE button until the stopwatch mode is displayed (often indicated by "ST" or "CHRONO").
- Press the ST/STP button to start the stopwatch.
- Press ST/STP again to pause the stopwatch.
- Press the RESET button to reset the stopwatch to zero.
3. Daily Alarm
When activated, the alarm will sound at the set time daily. To silence the alarm, press any button. The alarm will automatically reset for the next day.
Maintenance
1. Cleaning
Clean your watch with a soft, damp cloth. Avoid using harsh chemicals or abrasive materials, as these can damage the resin case and strap.
2. Water Resistance
This watch is water resistant to 165 feet (50 meters). It is suitable for short periods of recreational swimming, but not for diving or snorkeling. Do not press buttons underwater.
3. Battery Replacement
The watch uses one Lithium Metal battery. When the display dims or functions become erratic, the battery may need replacement. It is recommended to have the battery replaced by a qualified watch technician to ensure water resistance is maintained.
Troubleshooting
- Watch display is blank: The battery may be depleted. Replace the battery or contact customer support.
- Buttons are unresponsive: Ensure the watch is not in a locked mode (if applicable, though this model typically does not have one). If the issue persists, a battery reset or replacement may be needed.
- Time is inaccurate: Re-set the time and date as per the "Setting Time and Date" section. If inaccuracy persists, the battery may be low or the watch may require servicing.
- Water ingress: If water appears inside the watch, immediately cease use and have it inspected by a professional to prevent further damage.
Specifications
| Model Number | TW5K84900M6 |
| Case Material | Resin |
| Case Diameter | 36mm |
| Movement | Quartz Digital |
| Water Resistance | 50 meters (165 feet) |
| Functions | Time, Date, Day, 24-hour Stopwatch, Daily Alarm, Indiglo Light |
| Battery Type | 1 Lithium Metal battery (included) |
| Product Dimensions | 3.4 x 3 x 2.6 inches; 3.84 ounces |
Warranty and Support
Timex watches are manufactured to high standards and are backed by a limited warranty. For specific warranty details, please refer to the warranty card included with your purchase or visit the official Timex website.
For technical support, service, or to purchase replacement parts, please contact Timex Customer Service:
- Website: www.timex.com/support
- Phone: Refer to the Timex website for regional contact numbers.
When contacting support, please have your watch model number (TW5K84900M6) and purchase information readily available.





