1. Introduction
The FCXJTU 9999-Day Digital Countdown Timer Clock is a versatile and easy-to-use device designed to help you track important events, manage time for various activities, and serve as a reliable clock. With its large display and intuitive controls, it's suitable for a wide range of applications from personal milestones to professional settings.

Figure 1.1: Front view of the FCXJTU 9999-Day Digital Countdown Timer Clock.
2. Product Features
- Extended Countdown Capability: Tracks up to 9999 days, 23 hours, 59 minutes, and 59 seconds.
- Large, Clear Display: Features an 8.1cm x 5.2cm (3.2in x 2.1in) LCD screen with big digits for easy readability.
- Dual Functionality: Seamlessly switches between day countdown timer and a 12/24 hour clock with calendar function.
- User-Friendly Setting: Directly input current and target dates without manual day counting. Data is automatically saved.
- Flexible Placement: Equipped with a built-in back stand for tabletop use and three strong inset magnets for secure attachment to metal surfaces.
- Key Lock Function: Prevents accidental changes to settings.
- Wide Application: Ideal for tracking anniversaries, birthdays, holidays, vacations, weddings, new baby arrivals, retirement, meetings, study goals, and more.

Figure 2.1: Key features of the timer, including countdown, count-up, and clock calendar.

Figure 2.2: The timer displaying both countdown and clock interfaces.

Figure 2.3: Dimensions of the timer, showing its compact size.
Video 2.1: Overview of the FCXJTU Upgraded 9999-Day Countdown Timer Clock, demonstrating its features and functionality.
3. Setup
3.1 Battery Installation
The timer requires two CR2032 batteries (included). To install or replace batteries:
- Locate the battery cover on the back of the timer.
- Open the battery cover by sliding it or gently prying it open (refer to Figure 3.1).
- Insert the two CR2032 batteries, ensuring correct polarity (+/-).
- Close the battery cover securely.

Figure 3.1: Back view of the timer showing the battery cover, stand, and magnets.
Video 3.1: Instructions on how to change the batteries in the timer.
3.2 Placement Options
The timer offers flexible placement options:
- Tabletop: Utilize the integrated back stand to prop the timer upright on any flat surface.
- Magnetic Surface: The three strong inset magnets on the back allow for secure attachment to metal surfaces like refrigerators or whiteboards.
4. Operating Instructions
The timer features four main function buttons on the back: ST/SP (Start/Stop), - (Minus), + (Plus), and SET.
4.1 Setting the Day Countdown Timer
To set a specific day countdown:
- Press the SET button to switch to the countdown mode. The display will show '0000 DAY'.
- Hold down the SET button until the digits for the days start flashing.
- Use the + and - buttons to adjust the desired number of days.
- Press SET again to move to hours, then minutes, and seconds, adjusting each with + and -.
- Once all values are set, press SET one last time to confirm.
- Press the ST/SP button to start the countdown. Press again to pause, and again to resume.
- To clear the countdown, hold down the - and + buttons simultaneously.
4.2 Setting the Clock and Calendar
To set the current time and date:
- Ensure the timer is in clock mode (not countdown mode). If it's in countdown mode, press SET briefly to switch.
- Hold down the SET button until the year digits start flashing.
- Use the + and - buttons to adjust the year.
- Press SET to move to the month, then date, hour, minute, and second, adjusting each with + and -.
- You can switch between 12-hour and 24-hour time formats during the hour setting by pressing the ST/SP button.
- Once all values are set, press SET one last time to confirm and exit setting mode.
4.3 Key Lock Function
The timer includes a key lock function to prevent accidental button presses. To activate or deactivate the key lock, locate the small lock icon on the display. When the lock icon is visible, the buttons are locked. Refer to the product's visual guides or the video for specific button combinations to toggle this feature.
5. Maintenance
5.1 Battery Replacement
When the display dims or the timer functions become erratic, it's time to replace the batteries. Follow the steps outlined in Section 3.1 Battery Installation. It is recommended to replace both CR2032 batteries simultaneously for optimal performance.
5.2 Cleaning
To clean the timer, gently wipe the surface with a soft, dry cloth. Do not use abrasive cleaners, solvents, or immerse the device in water, as this can damage the electronics and display.
6. Troubleshooting
If you encounter issues with your FCXJTU Digital Countdown Days Timer Clock, consider the following common solutions:
- No Display or Dim Display: Check if the batteries are correctly installed and have sufficient power. Replace them if necessary.
- Buttons Not Responding: Ensure the key lock function is not activated. Deactivate it if the lock icon is visible on the screen.
- Incorrect Time/Date: Follow the instructions in Section 4.2 to reset the clock and calendar.
- Countdown Not Starting/Stopping: Verify that you are pressing the ST/SP button correctly. If the timer is locked, unlock it first.
If problems persist after attempting these steps, please contact customer support for further assistance.
7. Specifications
| Feature | Specification |
|---|---|
| Brand | FCXJTU |
| Model | 9999Day Clock Timer |
| Color | White |
| Material | Metal |
| Product Dimensions | 0.43"D x 4.02"W x 2.87"H (1.1cm D x 10.2cm W x 7.3cm H) |
| LCD Screen Size | 3.2" x 2.1" (8.1cm x 5.2cm) |
| Item Weight | 0.5 Ounces |
| Max Countdown | 9999 Days, 23 Hours, 59 Minutes, 59 Seconds |
| Batteries | 2 x CR2032 (Included) |
| Manufacturer | TIMYI |
8. Warranty and Support
For warranty information or technical support, please refer to the product packaging or contact the manufacturer directly. Keep your purchase receipt for any warranty claims.





