1. Introduction
This manual provides detailed instructions for the PINDOWS JP-PDS-640-N3 Ladies Analog Digital LED Watch. Please read this manual carefully to understand the watch's functions and ensure proper use and maintenance. This watch features both analog and digital time displays, LED backlighting, 50-meter water resistance, and multiple functions including a stopwatch, alarm, and calendar.

Image 1.1: Front view of the PINDOWS JP-PDS-640-N3 watch, highlighting its dual analog-digital display and button layout.

Image 1.2: Overview of the watch's main features.
2. Product Overview
Familiarize yourself with the watch's components and button functions.
2.1. Watch Components
- Display: Features both an analog dial and a digital LED display for time, date, and function indicators.
- Case: Durable ABS material.
- Strap: Flexible TPU material with a buckle closure.
- Back Cover: Stainless steel for enhanced durability.
2.2. Button Functions
The watch has four primary buttons located on the sides:
- LIGHT (Top Left): Activates the LED backlight for illumination.
- MODE (Bottom Left): Cycles through different modes (Time, Alarm, Stopwatch).
- START (Top Right): Used to start/stop functions in stopwatch mode, and adjust settings in setting mode.
- RESET (Bottom Right): Used to reset functions in stopwatch mode, and adjust settings in setting mode.

Image 2.1: Product parameter diagram, illustrating the watch's dimensions and material composition.

Image 2.2: Watch worn on wrist (blue variant).

Image 2.3: Watch worn on wrist (green variant).
3. Setup
3.1. Initial Time and Date Setting
- In normal time display mode, press the MODE button three times to enter the time setting mode. The seconds display will flash.
- Press the RESET button to cycle through the setting items: Seconds → Hour → Minute → Month → Date → Day of Week.
- Use the START button to adjust the flashing value. Hold START to change values more quickly.
- Once all settings are adjusted, press the MODE button to exit the setting mode and return to normal time display.
3.2. 12/24 Hour Format Selection
In normal time display mode, press the START button to toggle between 12-hour and 24-hour time formats.
4. Operating Instructions
4.1. LED Backlight
Press the LIGHT button (top left) to illuminate the digital display. The backlight will remain active for a few seconds.

Image 4.1: The watch display illuminated by its LED backlight.
4.2. Alarm Mode
- From normal time display, press the MODE button once to enter Alarm Mode. The alarm time will be displayed.
- Press the START button to toggle the alarm ON/OFF. An alarm icon will appear when activated.
- To set the alarm time, press the RESET button. The hour will flash. Use the START button to adjust the hour.
- Press RESET again to select minutes, then use START to adjust.
- Press MODE to exit Alarm Mode.
4.3. Stopwatch Mode
- From normal time display, press the MODE button twice to enter Stopwatch Mode. The display will show "00:00:00".
- Press the START button to begin timing.
- Press the START button again to pause timing.
- Press the RESET button to reset the stopwatch to "00:00:00".
- To resume timing after pausing, press START.
- Press MODE to exit Stopwatch Mode.
4.4. Hourly Chime
The watch features an hourly chime function. To activate or deactivate the hourly chime, press the MODE button once to enter Alarm Mode, then press the RESET button and the START button simultaneously. An icon will indicate if the hourly chime is active.
4.5. Water Resistance (50m)
This watch is rated for 50-meter water resistance. This means it is suitable for daily use, including:
- Washing hands
- Exposure to rain
- Showering (avoid hot water and steam)
- Swimming in shallow water
Important: Do not operate buttons while the watch is submerged in water. Avoid exposure to hot water or steam, as this can compromise the water resistance seals.

Image 4.2: Illustration of the watch's 50-meter water resistance capabilities.
5. Maintenance
5.1. Cleaning
Wipe the watch case and strap regularly with a soft, dry cloth. For stubborn dirt, use a slightly damp cloth and mild soap, then wipe dry immediately. Avoid using harsh chemicals or abrasive cleaners.
5.2. Battery Replacement
When the display becomes dim or functions become erratic, the battery may need replacement. Battery replacement should be performed by a qualified watch technician to ensure proper sealing and water resistance. Do not attempt to open the watch case yourself.
5.3. Storage
Store the watch in a cool, dry place away from direct sunlight, extreme temperatures, and strong magnetic fields when not in use for extended periods.
6. Troubleshooting
- Display is blank or dim: The battery may be low or depleted. Replace the battery.
- Buttons are unresponsive: Ensure the watch is not in a locked mode (if applicable, though this model does not specify one). If issues persist, a battery replacement or professional inspection may be required.
- Time is inaccurate: Re-set the time according to the instructions in Section 3.1. If inaccuracy persists, the watch may require servicing.
- Water ingress: If water appears inside the watch, immediately take it to a professional for inspection and repair to prevent further damage.
7. Specifications
| Feature | Specification |
|---|---|
| Model Number | JP-PDS-640-N3 |
| Brand | PINDOWS |
| Display Type | Analog and Digital LED |
| Water Resistance | 50 meters (5 ATM) |
| Case Material | ABS |
| Strap Material | TPU |
| Back Cover Material | Stainless Steel |
| Weight | 43g |
| Housing Diameter | 43.5mm (1.71 inches) |
| Case Thickness | 17mm (0.67 inches) |
| Strap Width | 19mm (0.75 inches) |
| Band Length | 140mm - 196mm (5.51 - 7.71 inches) |
| Functions | LED Backlight, 50m Water Resistance, Hourly Chime, 1/100 Stopwatch, Calendar, Alarm, 12/24 Hour Format |
8. Warranty and Support
PINDOWS provides a standard warranty for manufacturing defects. Please refer to your purchase documentation for specific warranty terms and conditions. For technical support or service inquiries, please contact your retailer or the PINDOWS customer service department.
Keep your purchase receipt as proof of purchase for warranty claims.