Product Overview
The Timex Expedition TW4B02400GP is a robust digital chronograph watch designed for outdoor activities. It features a durable resin case, a comfortable Fast-Wrap Velcro strap, and essential functions like a stopwatch, countdown timer, alarm, and Indiglo night-light. Its 100-meter water resistance makes it suitable for various water-related activities.

Image: Timex Expedition TW4B02400GP Digital Chronograph Watch, showcasing its black and blue design with a digital display and Fast-Wrap Velcro strap.
Setup
Initial Time and Date Setting
- Enter Set Mode: Press and hold the SET button (typically top-left) until the display flashes.
- Adjust Values: Use the START/STOP button (typically top-right) to increase the flashing value (e.g., hours, minutes, year).
- Select Next Field: Press the MODE button (typically bottom-left) to move to the next setting field (e.g., minutes, month, day).
- Exit Set Mode: Once all settings are adjusted, press the SET button again to save and exit.
Strap Adjustment
The watch features a Fast-Wrap Velcro strap for easy and secure fitting. Adjust the strap by pulling the end through the buckle and securing the Velcro to achieve a comfortable and snug fit on your wrist. Ensure it is not too tight to allow for proper circulation, nor too loose to prevent the watch from moving excessively.
Operating Instructions
Basic Time Display
In the default time mode, the watch displays the current time (hours, minutes, seconds) and date (month, day of week, day of month).
Indiglo Night-Light
Press the LIGHT button (typically top-right or a dedicated button) to activate the Indiglo night-light. The entire watch face will illuminate for a few seconds, allowing for easy readability in low-light conditions.
Stopwatch Function
- Access Stopwatch: Press the MODE button repeatedly until 'CHRONO' or 'STW' appears on the display.
- Start/Stop: Press the START/STOP button to begin timing. Press it again to pause.
- Reset: While paused, press the RESET button (typically bottom-right) to clear the stopwatch to zero.
Countdown Timer
- Access Timer: Press the MODE button repeatedly until 'TIMER' or 'TMR' appears.
- Set Timer: Press and hold the SET button to enter timer setting mode. Use START/STOP to adjust hours/minutes/seconds and MODE to move between fields. Press SET to confirm.
- Start/Stop: Press START/STOP to begin the countdown. Press again to pause.
- Reset: While paused, press RESET to return to the set time. An audible alarm will sound when the timer reaches zero.
Alarm Function
- Access Alarm: Press the MODE button repeatedly until 'ALARM' or 'ALM' appears.
- Set Alarm: Press and hold the SET button to enter alarm setting mode. Use START/STOP to adjust hours/minutes and MODE to move between fields. Press SET to confirm.
- Activate/Deactivate: In alarm mode, press START/STOP to toggle the alarm ON/OFF. An alarm icon will appear when active.
- Snooze: When the alarm sounds, press any button (except RESET) to activate snooze, which will sound again after a few minutes. Press RESET to turn off the alarm completely.
Maintenance
Cleaning
Clean your watch regularly with a soft, damp cloth. For the Velcro strap, occasional hand washing with mild soap and water is recommended to remove dirt and sweat. Ensure the watch is completely dry before wearing.
Water Resistance
The watch is water resistant to 100 meters (330 feet). This means it is suitable for showering, swimming, and snorkeling. However, it is not suitable for scuba diving or high-impact water sports. Do not operate buttons underwater to maintain water resistance integrity.
Battery Replacement
When the display dims or functions become erratic, the battery may need replacement. It is highly recommended to have the battery replaced by an authorized Timex service center or a professional watch repairer to ensure proper sealing and maintain the watch's water resistance.
Troubleshooting
- Display is blank or dim: The battery may be low or depleted. Replace the battery as described in the Maintenance section.
- Buttons are unresponsive: Ensure the watch is not in a locked mode (if applicable, consult specific model instructions for lock features). If the issue persists, a battery replacement or a soft reset (removing and reinserting the battery) by a professional may be required.
- Time is inaccurate: Re-set the time and date as described in the Setup section. If the watch continues to lose or gain time significantly, the internal movement may require servicing.
- Water inside the watch: If condensation or water appears inside the watch, immediately take it to an authorized service center. This indicates a breach in the water resistance seal.
Specifications
| Model Number | TW4B02400GP |
| Brand | TIMEX |
| Color | Black Blue |
| Material | Resin |
| Screen Size | 1.25 Inches |
| Water Resistance | 100 Meters (330 Feet) |
| Item Weight | 90 g |
| Features | Stopwatch, Countdown Timer, Alarm, Indiglo Night-Light, Fast-Wrap Velcro Strap |
Warranty Information
This Timex watch is covered by a manufacturer's warranty against defects in materials and workmanship. The specific terms and duration of the warranty may vary by region. Please refer to the warranty card included with your purchase or visit the official Timex website for detailed information regarding warranty coverage and claims.
Support
For further assistance, technical support, or service inquiries, please contact Timex customer service. Contact information can typically be found on the official Timex website or in the documentation provided with your watch. When contacting support, please have your watch model number (TW4B02400GP) and purchase details readily available.





