1. Introduction
Thank you for choosing the Alloet Professional Handheld Digital Stopwatch. This device is designed for precise timing in various activities, including sports training, games, fitness, and experiments. This manual provides essential information on its features, operation, and care to ensure optimal performance and longevity.
2. Safety Information
- Keep the device out of reach of children under 3 years old to prevent accidental ingestion of small parts or damage.
- Inspect the stopwatch for any damage or loose parts before each use. Do not operate if it appears faulty.
- Avoid using the stopwatch in extremely dangerous environments, such as those with flammable or explosive materials, or areas with excessive dust or high humidity, to prevent damage to the device.
- Do not attempt to disassemble, modify, or repair the stopwatch yourself. This can damage the internal components and void the warranty.
- Store the stopwatch properly when not in use to prevent accidental damage.
3. Product Features
- Shutdown Function: Allows the device to be powered off without resetting the clock.
- Key Mute Function: Enables silent operation for use in quiet environments.
- Time and Calendar: Displays year, month, day, hour, minute, second, and week. Supports 12/24 hour system selection.
- Stopwatch Function: Features a 3-row display with segmented memory storage. Provides 1/100 second precision for up to 9 hours, 59 minutes, and 59 seconds. Allows viewing of fastest, slowest, and average times, with up/down memory search.
- Countdown Function: Configurable countdown timer and times counting function, with a maximum duration of 9 hours, 59 minutes, and 59 seconds.
- Daily Alarm Clock: Quick activation and deactivation of the alarm.
- Metronome Function: Adjustable beat frequency from 5 to 320 beats per minute (in multiples of 5), includes a times counting function.
4. Specifications
| Attribute | Detail |
|---|---|
| Model Numbers | YS810, YS830, YS860, YS8100 |
| Display Type | 3 rows display (10/30/60/100 tracks, varies by model) |
| Material | ABS plastic shell |
| Battery | Built-in CR2032 button battery (non-rechargeable) |
| Display Size | 35 x 23.5 mm (1.38 x 0.93 inches) |
| Product Size | 75 x 62 x 21 mm (2.95 x 2.44 x 0.83 inches) |
| Gross Weight | 70g |
| Water Resistance | Domestic water resistance (splash-proof, not for submersion) |
For more detailed specifications, please refer to the official product documentation.
5. Getting Started & Setup
5.1 Package Contents
- 1 x Digital Stopwatch
5.2 Battery Installation/Replacement
The stopwatch comes with a built-in CR2032 button battery. When the display becomes dim or unresponsive, it's time to replace the battery.
- Locate the battery compartment on the back of the stopwatch.
- Use a small screwdriver or coin to open the compartment cover.
- Carefully remove the old CR2032 battery.
- Insert a new CR2032 battery with the positive (+) side facing up.
- Securely close the battery compartment cover.
5.3 Initial Power On
The stopwatch should power on automatically once the battery is correctly installed. If not, press the MODE button to activate the display.

6. Operating Instructions
The stopwatch features four main buttons: LAP/SET/RESET, RECALL, START/STOP/SELECT, and MODE. The MODE button cycles through the different functions: Time, Stopwatch, Countdown, Alarm, and Metronome.
6.1 Setting Time and Calendar
- Press MODE repeatedly until the Time display is shown.
- Press and hold LAP/SET/RESET to enter setting mode. The seconds display will flash.
- Press START/STOP/SELECT to adjust the flashing value (seconds, minutes, hours, day, month, year, 12/24 hour format).
- Press LAP/SET/RESET to move to the next setting item.
- Once all settings are complete, press MODE to exit setting mode.
6.2 Using the Stopwatch Function
- Press MODE repeatedly until the Stopwatch display is shown (indicated by 'STOP-W').
- Press START/STOP/SELECT to start the stopwatch.
- During timing, press LAP/SET/RESET to record a lap time. The display will show the lap time while the stopwatch continues to run in the background.
- Press START/STOP/SELECT again to pause the stopwatch.
- To resume, press START/STOP/SELECT. To reset to zero, press LAP/SET/RESET while paused.
- To recall stored lap/split times, press RECALL while the stopwatch is stopped. Use START/STOP/SELECT and LAP/SET/RESET to navigate through memory.

6.3 Using the Countdown Function
- Press MODE repeatedly until the Countdown display is shown (indicated by 'TIMER').
- Press and hold LAP/SET/RESET to enter setting mode.
- Use START/STOP/SELECT to adjust the desired countdown time (hours, minutes, seconds).
- Press LAP/SET/RESET to move between time units.
- Press START/STOP/SELECT to start the countdown.
- Press START/STOP/SELECT again to pause/resume.
- Press LAP/SET/RESET while paused to reset the countdown.
6.4 Using the Alarm Function
- Press MODE repeatedly until the Alarm display is shown.
- Press and hold LAP/SET/RESET to enter setting mode.
- Use START/STOP/SELECT to adjust the alarm time (hours, minutes).
- Press LAP/SET/RESET to move between hours and minutes.
- Press MODE to exit setting mode.
- To turn the alarm on/off, press START/STOP/SELECT while in Alarm mode (not in setting mode).
6.5 Using the Metronome Function
- Press MODE repeatedly until the Metronome display is shown (indicated by 'PACE').
- Press and hold LAP/SET/RESET to enter setting mode.
- Use START/STOP/SELECT to adjust the beat frequency (5-320 beats/minute).
- Press MODE to exit setting mode.
- Press START/STOP/SELECT to start/stop the metronome.

7. Maintenance & Care
- Cleaning: After use, gently wipe the surface of the stopwatch with a soft, dry cloth to remove any dust, dirt, or moisture. Avoid using harsh chemicals or abrasive cleaners.
- Storage: Store the stopwatch in a dry, well-ventilated area, away from direct sunlight, extreme temperatures, and high humidity. Avoid placing heavy objects on top of it.
- Water Resistance: The stopwatch has domestic water resistance, meaning it can withstand splashes or light rain. Do not submerge it in water or expose it to strong jets of water.

8. Troubleshooting
- Display is dim or blank: The battery may be low or depleted. Replace the CR2032 button battery.
- Buttons are unresponsive: Ensure the stopwatch is not in a locked mode (if applicable, check specific model instructions). Try removing and reinserting the battery to perform a soft reset.
- Incorrect time/date: Re-enter the time and calendar settings as described in Section 6.1.
9. User Tips
- Model Differences: The primary difference between models YS810, YS830, YS860, and YS8100 typically lies in their memory capacity for tracks (e.g., 10, 30, 60, or 100 tracks). Refer to your specific model's packaging or detailed specifications for exact memory capabilities.
- Time Functionality: Yes, all models include a time and calendar function, allowing them to display the current time, date, and day of the week.
- Precision: The stopwatch function offers high precision, measuring time down to 1/100th of a second.
10. Warranty & Support
For warranty information, technical support, or further assistance, please contact the seller or refer to the official product page. Keep your purchase receipt as proof of purchase.
A more detailed user manual in PDF format may be available for download from the product's online listing or the manufacturer's website. (Reference: User Manual (PDF))





