Introduction
This manual provides detailed instructions for the setup, operation, and maintenance of your Lexon Cubissimo Alarm Clock, model LR79R5. Please read this manual thoroughly before using the device to ensure proper functionality and longevity.
Product Overview
The Lexon Cubissimo is a compact alarm clock featuring an LCD display. Its unique cube design allows for intuitive interaction. The device is constructed from Acrylonitrile Butadiene Styrene (ABS) and aluminum, offering durability and a modern aesthetic.

Image 1: Front view of the Lexon Cubissimo Alarm Clock in red, displaying time and day on its LCD screens. This image illustrates the compact, cube-shaped design and the dual-screen display capability.

Image 2: A collection of Lexon Cubissimo Alarm Clocks in different colors, showcasing their versatility and compact size. Each clock displays various information such as time, date, or temperature, highlighting the multi-functional display.
Setup
1. Battery Installation
The Lexon Cubissimo Alarm Clock is battery-powered. Batteries are not included with the product.
- Locate the battery compartment. This is typically found on the top or bottom surface of the cube, often concealed under a removable panel.
- Open the battery compartment cover.
- Insert the required batteries, ensuring correct polarity (+/-). Refer to the markings inside the compartment.
- Close the battery compartment cover securely.

Image 3: Top view of the Lexon Cubissimo Alarm Clock with the battery compartment open, showing the control panel. This panel includes buttons for MODE, 12/24 hour format, Celsius/Fahrenheit selection, and switches for LOCK, TIME SET, ALM SET, SNZ (Snooze), ON, OFF, and ALM (Alarm).
2. Initial Power On
Once batteries are installed, the clock should power on automatically. The LCD display will activate.
Operating Instructions
The Lexon Cubissimo features multiple control buttons and switches located under the top panel (refer to Image 3).
Setting the Time
- Open the top panel to access the controls.
- Slide the main switch to the TIME SET position.
- Use the MODE button to cycle through hours, minutes, and possibly date settings.
- Use the Up (▲) and Down (▼) buttons to adjust the values.
- Once the time is set, slide the main switch back to the LOCK position to save settings and prevent accidental changes.
Setting the Alarm
- Open the top panel.
- Slide the main switch to the ALM SET position.
- Use the MODE button to cycle through alarm hours and minutes.
- Use the Up (▲) and Down (▼) buttons to adjust the alarm time.
- Slide the main switch back to the LOCK position.
- To activate the alarm, slide the ALM switch to ON. To deactivate, slide to OFF.
Using the Snooze Function
When the alarm sounds, press the SNZ button (Snooze) to temporarily silence the alarm. The alarm will sound again after a short interval (typically 5-10 minutes).
Changing Display Format (12/24 Hour, °C/°F)
- Use the 12/24 button to toggle between 12-hour and 24-hour time formats.
- Use the °C/°F button to switch between Celsius and Fahrenheit temperature display (if applicable to your model).
Maintenance
Cleaning
To clean the Lexon Cubissimo Alarm Clock, use a soft, dry, or slightly damp cloth. Avoid using abrasive cleaners, solvents, or chemical sprays, as these can damage the finish and electronic components.
Battery Replacement
Replace batteries when the display dims or the clock functions become erratic. Always use the recommended battery type and dispose of old batteries responsibly.
Troubleshooting
- Clock not turning on or display is blank:
- Check if batteries are inserted correctly with the right polarity.
- Replace old batteries with new ones.
- Ensure the battery compartment cover is securely closed.
- Alarm not sounding:
- Verify that the ALM switch is set to ON.
- Ensure the alarm time is set correctly.
- Check battery level.
- Incorrect time display:
- Re-enter the time using the TIME SET function.
- Ensure the main switch is in the LOCK position after setting the time.
Specifications
| Feature | Detail |
|---|---|
| Brand | Lexon |
| Model Number | LR79R5 |
| Colour | Red |
| Display Type | LCD |
| Special Feature | Alarm |
| Power Source | Battery Powered |
| Room Type | Bedroom, Living Room, Office |
| Shape | Rectangular (Cube) |
| Material | Acrylonitrile Butadiene Styrene (ABS), aluminum |
| Item Weight | 0.15 Kilograms (154 g) |
| Dimensions (LxWxH) | 5.1 x 5.1 x 5.1 cm (50 x 50 x 50 Millimeters) |
| Operation Mode | Mechanical |
Warranty and Support
Specific warranty information for the Lexon Cubissimo Alarm Clock model LR79R5 is not provided in this manual. For warranty details, product support, or service inquiries, please refer to the official Lexon website or contact your retailer.
You may also visit the Lexon Brand Page on Amazon for additional information.





