1. Introduction
Thank you for choosing the PINDOWS PDS-621 Digital Sport Watch. This manual provides detailed instructions on how to set up, operate, and maintain your watch. Please read this manual carefully to ensure proper use and to fully utilize all features of your new timepiece.

Image 1.1: Front view of the PINDOWS PDS-621 Digital Sport Watch. The watch features a white case and strap with a black and white digital and analog display, indicating time, date, and other functions.
2. Product Overview
Familiarize yourself with the buttons and display areas of your PINDOWS PDS-621 watch.

Image 2.1: Diagram illustrating the button layout and display areas of the PINDOWS PDS-621 watch. Key buttons include LIGHT (top left), MODE (bottom left), START/PAUSE (top right), and ADJUSTMENT (bottom right). The dial shows date, week, and time displays.
- LIGHT Button (Top Left): Activates the backlight for visibility in low-light conditions.
- MODE Button (Bottom Left): Cycles through different watch modes (Time, Alarm, Stopwatch, Dual Time).
- START/PAUSE Button (Top Right): Used to start/stop functions like the stopwatch or to increment values during setting.
- ADJUSTMENT Button (Bottom Right): Used to select items or confirm settings, and to reset functions.
3. Features
Your PINDOWS PDS-621 watch comes equipped with the following functionalities:
- Alarms: Set daily alarms.
- Dual Time Zone: Display time for two different time zones simultaneously.
- Hourly Chime: An audible signal at the top of every hour.
- 12/24-Hour Format: Choose between standard 12-hour or military 24-hour time display.
- 50M Water Resistance: Suitable for splashes, rain, and brief immersion in water. Not for hot showers or pressing buttons underwater.
- Stopwatch Function: Measure elapsed time with precision.
- Manual Sleep Function: (Details not specified, typically refers to a power-saving mode or display off function).
- Single Color Backlight: Illuminates the digital display for easy reading in the dark.
- Calendar Display: Shows date and day of the week.
4. Setup Instructions
4.1. Setting Time and Date
- From the normal time display, press the MODE button repeatedly until the seconds begin to flash, indicating you are in setting mode.
- Press the ADJUSTMENT button to cycle through the settings: Seconds → Hour → Minute → Month → Date → Day of Week.
- While a value is flashing, use the START/PAUSE button to increase the value. Hold the button to rapidly advance.
- Once all settings are correct, press the MODE button to exit the setting mode and return to the normal time display.
4.2. Setting the Alarm
- From the normal time display, press the MODE button until 'AL' or the alarm time appears on the display.
- Press the ADJUSTMENT button to select the hour or minute digit you wish to set. The selected digit will flash.
- Use the START/PAUSE button to adjust the flashing hour or minute.
- Press the MODE button to exit the alarm setting mode.
- To turn the alarm ON/OFF, while in alarm mode, press the START/PAUSE button. An alarm icon will appear/disappear to indicate its status.
4.3. Setting Hourly Chime
- From the normal time display, press the MODE button until 'AL' or the alarm time appears.
- Press the ADJUSTMENT button twice (or until the hourly chime indicator flashes).
- Press the START/PAUSE button to toggle the hourly chime ON/OFF. A chime icon will appear/disappear.
- Press the MODE button to return to normal time display.
5. Operating Instructions
5.1. Using the Stopwatch
- From the normal time display, press the MODE button until 'ST' or 'STOP' appears, indicating stopwatch mode.
- Press the START/PAUSE button to start the stopwatch.
- Press the START/PAUSE button again to pause the stopwatch.
- Press the ADJUSTMENT button to reset the stopwatch to zero.
- Press the MODE button to return to the normal time display.
5.2. Activating the Backlight
- Press the LIGHT button (top left) to illuminate the digital display. The backlight will remain on for a few seconds.
5.3. Switching 12/24-Hour Format
- In normal time display, press the START/PAUSE button to toggle between 12-hour (with 'AM'/'PM' indicator) and 24-hour format.
5.4. Dual Time Function
- From the normal time display, press the MODE button repeatedly until 'DT' or 'DUAL TIME' appears.
- Press the ADJUSTMENT button to select the hour or minute digit you wish to set for the second time zone. The selected digit will flash.
- Use the START/PAUSE button to adjust the flashing hour or minute.
- Press the MODE button to exit the dual time setting mode.
6. Maintenance and Care
- Cleaning: Wipe the watch regularly with a soft, dry cloth. For stubborn dirt, use a slightly damp cloth and mild soap, then dry thoroughly.
- Water Resistance: The watch is 50M water resistant. This means it can withstand splashes, rain, and brief immersion. Do not press any buttons while the watch is wet or submerged. Avoid hot showers or saunas as steam can penetrate the seals and cause internal damage.
- Battery: The watch uses 2 CR2 batteries. Battery replacement should ideally be performed by a qualified technician to ensure water resistance is maintained.
- Storage: Store your watch in a cool, dry place away from direct sunlight and extreme temperatures.
- Avoid Chemicals: Keep the watch away from solvents, detergents, perfumes, and cosmetics, as these can damage the case, strap, or seals.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or dim. | Low battery. | Replace batteries (2 CR2). |
| Buttons are unresponsive. | Watch may be wet or in an incorrect mode. | Ensure watch is dry. Try pressing the MODE button to cycle through modes. If issue persists, battery may be low. |
| Water condensation inside the watch. | Exposure to hot water/steam or buttons pressed underwater. | Stop using the watch immediately. Seek professional service to prevent further damage. Avoid hot showers and pressing buttons underwater. |
| Time is inaccurate. | Incorrect setting or low battery. | Re-set the time following Section 4.1. If issue persists, replace batteries. |
8. Specifications
- Model Number: PDS-621
- Case Diameter: 1.97 inches (50 mm)
- Dial Thickness: 0.7 inches (18 mm)
- Band Width: 0.87 inches (22 mm)
- Wearable Band Length: 6.7 inches (170 mm) - 9.4 inches (240 mm)
- Total Watch Length: 10.2 inches (260 mm)
- Watch Weight: 65 grams
- Case and Strap Material: PU (Polyurethane)
- Dial Material: PMMA (Highly Transparent Acrylic Mirror)
- Back Cover and Buckle Material: 304 Stainless Steel
- Water Resistance: 50M
- Battery Type: 2 x CR2 (requires batteries)
9. Safety Information and Warnings
- Water Exposure: Do not press any buttons while the watch is submerged in water. Avoid wearing the watch during hot showers or in saunas, as high temperatures and steam can compromise the watch's water resistance.
- Temperature: Do not expose the watch to strong sunlight for extended periods or near fire to prevent damage.
- Backlight: This PDS-621 model features a single-color backlight only, not a 7-color light.
10. Warranty and Support
PINDOWS provides professional support and a one-year refund service for quality issues. If you encounter any problems with your watch or require assistance with settings, please contact our customer service for a satisfactory solution.
For further assistance, please refer to the contact information provided with your purchase or visit the official PINDOWS website.