Product Overview
The Timex Command Shock Digital Watch, Model TW5M20400, is engineered for durability and functionality. This timepiece features a robust design, shock resistance, and water resistance up to 100 meters, making it suitable for various activities including swimming and snorkeling. Key features include a digital display, multiple alarms, a timer, and a hydration alert.

Front view of the Timex Command Shock Digital Watch, displaying the digital interface and robust casing.
Setup
Initial Setup and Battery
Your Timex Command Shock Digital Watch comes with a Lithium Metal battery pre-installed. No initial charging or battery installation is required for immediate use.
Setting Time and Date
- Press the MODE button repeatedly until the time setting mode is displayed.
- Use the SET button to select the digit you wish to adjust (e.g., hours, minutes, year, month, day).
- Use the START/STOP or SPLIT/RESET buttons to increase or decrease the selected value.
- Once all settings are correct, press the MODE button to exit the setting mode.
Band Adjustment
The watch features an adjustable resin strap designed for comfort and secure fit. To adjust the band, locate the buckle and adjust the pin to the desired hole on the strap. Ensure the watch is snug but not overly tight on your wrist.

Detail of the adjustable resin strap and buckle on the Timex Command Shock Digital Watch.
Operating Instructions
Basic Functions
- Time Display: The main display shows the current time, day, and date.
- Indiglo Backlight: Press the INDIGLO button (typically on the top right) to illuminate the display for visibility in low-light conditions.
Advanced Functions
- Alarms: The watch supports up to three independent alarms. Each alarm can be configured for vibration, audio, or a combination of both. You can set alarms for daily, weekday, or weekend activation.
- Timer: Access the timer function via the MODE button. Set the countdown timer in hours, minutes, and seconds. A repeat function is available for continuous countdown cycles.
- Hydration Alert: This feature provides a periodic reminder (single beep chime) to drink water or for any repetitive event at an interval of your choice.
- Night Mode: Activate Night Mode to enable the Indiglo backlight with any button press for an eight-hour period. This feature automatically deactivates after the set duration.

Side view of the watch, highlighting the control buttons for mode selection and adjustments.
Maintenance
Water Resistance
The Timex Command Shock Digital Watch is water-resistant up to 100 meters (330 feet). This makes it suitable for recreational swimming and snorkeling. It is not recommended for scuba diving or high-impact water sports.
Cleaning
To clean your watch, wipe it with a soft, damp cloth. Avoid using harsh chemicals or abrasive materials, which can damage the watch's finish or seals.
Battery Replacement
The watch uses one Lithium Metal battery. When the display dims or functions become erratic, it may be time for a battery replacement. It is recommended to have the battery replaced by a qualified watch technician to ensure proper sealing and maintain water resistance.
Crystal Care
The watch features an acrylic crystal. While durable, acrylic can be prone to scratches. Avoid contact with sharp objects and abrasive surfaces. Minor scratches can often be buffed out with specialized acrylic polish.
Troubleshooting
- Display is blank or dim: Check the battery. If the battery is low, replace it.
- Buttons are unresponsive: Ensure the watch is not in a locked mode. If issues persist, a soft reset (refer to specific model instructions if available, or remove/reinsert battery) may be necessary.
- Time is inaccurate: Re-set the time and date. If inaccuracy continues, the battery may be low or the watch may require servicing.
Specifications
| Feature | Detail |
|---|---|
| Model Number | TW5M20400 |
| Display Type | Digital |
| Case Diameter | 54 Millimeters |
| Case Thickness | 16 Millimeters |
| Band Material Type | Resin |
| Water Resistance Depth | 100 Meters |
| Movement Type | Quartz |
| Power Source | Battery Powered (1 Lithium Metal battery included) |
| Crystal Material | Acrylic |
| Special Features | Shock-resistant, Hydration Alert, Indiglo Backlight, Multiple Alarms, Timer |
Warranty and Support
This Timex watch is covered by a manufacturer's warranty. For detailed information regarding warranty terms, coverage, and service procedures, please refer to the official Timex website or contact Timex customer support directly. Keep your proof of purchase for warranty claims.





