1. Introduction
Thank you for purchasing the Voice Control Digital Alarm Clock. This clock features a clear LED display, dual alarm settings, temperature display, and a convenient voice control function. Designed for use in bedrooms, offices, or any space where a reliable and smart timekeeping device is needed, it offers both USB plug-in and battery-powered options.

2. Safety Information
- Keep the device away from water and high humidity environments.
- Do not expose the device to direct sunlight or extreme temperatures.
- Use only the specified power adapter (DC 5V) to avoid damage.
- Keep out of reach of children.
- Do not attempt to disassemble or repair the device yourself.
3. Package Contents
- Digital Alarm Clock (Model SZ-811/NNBB-24045)
- User Manual
- DC Power Cable
4. Product Overview
This digital alarm clock offers a range of features for your convenience:
- Dual Alarm Settings: Set two independent alarms.
- Temperature Display: Shows ambient temperature.
- Power Options: Can be powered via USB (for continuous screen display) or 3xAAA batteries (for voice-activated screen display).
- Voice Control: Activate the screen by clapping hands or making a sound over 60dB when battery-powered.
- 3-Level Brightness: Adjustable LED display brightness.
- Time Format: Switch between 12-hour and 24-hour formats.
- Silent Operation: The clock operates silently without a ticking sound.

5. Setup
- Unpack and Inspect: Carefully remove the clock and all accessories from the packaging.
- Remove Protective Film: Peel off the protective film from the screen before use. This will ensure the screen is brighter and clearer.
- Power Connection:
- USB Power: Connect the provided DC power cable to the DC 5V port on the back of the clock and plug the other end into a USB power adapter (not included) or a USB port. The screen will remain continuously on.
- Battery Power: Open the battery compartment on the back of the clock and insert three AAA batteries (not included), ensuring correct polarity. When battery-powered, the screen will turn off after 5-10 seconds to conserve energy.


6. Operating Instructions
The clock features several buttons on the top for various functions. Refer to the video demonstration for visual guidance.
Video demonstrating the operation of the digital alarm clock, including setting the time, switching between 12/24 hour format, displaying temperature in Celsius and Fahrenheit, and adjusting alarm settings.
6.1. Setting Time and Date
Specific button functions for setting time and date are typically indicated by icons or labels on the clock's buttons. Generally, a 'SET' or 'MODE' button is used to enter setting mode, and '+' / '-' buttons adjust values. A 'SET' or 'MODE' button press again confirms the setting or moves to the next parameter.
6.2. 12/24 Hour Format
Press the designated button (often labeled '12/24H' or integrated with the time setting) to toggle between 12-hour and 24-hour display formats.
6.3. Setting Alarms
This clock supports two alarms. Look for 'ALARM 1' and 'ALARM 2' buttons or a dedicated 'ALARM' button that cycles through alarm settings. Use the '+' / '-' buttons to set the desired alarm time. Confirm each setting to save.
6.4. Temperature Display
The clock displays temperature. A dedicated button (often labeled '°C/°F' or similar) allows switching between Celsius and Fahrenheit units.
6.5. Brightness Adjustment
The LED display has 3 levels of brightness. A 'BRIGHTNESS' or 'DIMMER' button, or repeated presses of a specific button, will cycle through the brightness levels.
6.6. Voice Control Function
When the clock is running on battery power, the screen will turn off after 5-10 seconds. To reactivate the screen, make a sound louder than 60dB, such as clapping your hands or knocking on the table. The screen will light up for 5-10 seconds.
7. Maintenance
- Cleaning: Wipe the clock with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Battery Replacement: If using batteries, replace all three AAA batteries simultaneously when the display becomes dim or unresponsive.
- Storage: If storing the clock for an extended period, remove the batteries to prevent leakage.
8. Troubleshooting
- Screen is off or dim:
- If using battery power, the screen turns off automatically. Activate it with voice control (clap or knock).
- Ensure batteries are fresh and correctly inserted.
- If you want the screen to be continuously on, plug the clock into a USB power source using the DC power cable.
- Check if the protective film has been removed from the screen.
- Clock not responding to voice control:
- Ensure the clock is running on battery power. Voice control is primarily for battery mode to save power.
- Make sure the sound is loud enough (over 60dB) and close enough to the clock.
- Alarms not sounding:
- Verify that the alarm times are set correctly and the alarm is activated (look for an alarm icon on the display).
- Check the volume settings if applicable (some models have adjustable alarm volume).
9. Specifications
| Attribute | Value |
|---|---|
| Model Number | SZ-811/NNBB-24045 |
| Material | Plastic (PVC lens + ABS) |
| Display Type | Digital LED |
| Motivity Type | Digital |
| Function | Acoustic Control Sensing, Dual Alarms, Temperature Display, Brightness Adjustment |
| Power Source | DC 5V (USB cable included), 3xAAA Batteries (not included) |
| Dimensions (L x H x W) | 120mm x 60mm x 40mm |
| Weight | 140g |
| Time Format | 12H/24H selectable |
| Brightness Levels | 3 levels |
10. Warranty and Support
This product comes with a standard manufacturer's warranty. For any issues or support inquiries, please refer to the seller's contact information or the platform where the product was purchased. Keep your purchase receipt as proof of purchase.





