1. Product Overview
The Karlsson KA5805WD is a modern, hexagonal LED alarm clock designed to display time, day, date, and temperature. Its minimalist design allows it to be placed on a table or mounted on a wall. The clock features touch and sound activation for display control.

Figure 1: Front view of the Karlsson KA5805WD LED Alarm Clock, showing the digital display for time, day, date, and temperature.
2. Setup
2.1 Unpacking
Carefully remove the alarm clock from its packaging. Ensure all components are present: the Karlsson KA5805WD LED Alarm Clock and a USB power cable. Batteries are not included and must be purchased separately.
2.2 Powering the Device
The alarm clock can be powered in two ways:
- Battery Power: Open the battery compartment located on the back of the clock. Insert 3x AA batteries (not included), ensuring correct polarity (+/-). Battery power enables motion/sound activation and allows the clock to be portable. Note that battery life may vary depending on usage.
- USB Power: Connect the provided USB cable to the DC 5V input port on the back of the clock. Plug the other end into a compatible USB power adapter (not included) or a powered USB port. Using USB power keeps the display continuously lit.

Figure 2: Rear view of the alarm clock, highlighting the control buttons (MODE, UP, DOWN, ALARM) and the battery compartment.
3. Operating Instructions
The control buttons (MODE, UP, DOWN, ALARM) are located on the back of the unit (refer to Figure 2).
3.1 Setting Time and Date
- Press the MODE button to cycle through display modes (Time, Date, Temperature).
- To set the time, press and hold the MODE button until the hour digits flash.
- Use the UP and DOWN buttons to adjust the hour.
- Press MODE again to move to minutes, then adjust with UP and DOWN.
- Continue pressing MODE to set the year, month, and day in a similar manner.
- Press MODE one last time to exit setting mode.
3.2 Setting the Alarm
- Press the ALARM button once to view the current alarm time.
- Press and hold the ALARM button until the alarm hour digits flash.
- Use the UP and DOWN buttons to set the desired alarm hour.
- Press ALARM again to set the alarm minutes, then adjust with UP and DOWN.
- Press ALARM one last time to confirm and exit.
- To activate/deactivate the alarm, press the ALARM button briefly when the alarm time is displayed. An indicator (e.g., a small dot or icon) will appear on the display when the alarm is active.
3.3 Temperature Display
The clock automatically displays the ambient temperature. The unit of temperature (Celsius or Fahrenheit) can typically be switched by pressing the DOWN button during normal time display, though this may vary by firmware version.
3.4 Sound and Touch Activation
When operating on battery power, the display can be set to turn off automatically to conserve energy. To activate the display, simply touch the clock or make a sound (e.g., clap your hands) near it. The display will illuminate for a few seconds before turning off again.
4. Maintenance
4.1 Cleaning
To clean the clock, gently wipe the surface with a soft, dry cloth. Do not use abrasive cleaners, solvents, or chemical sprays, as these can damage the finish and electronic components.
4.2 Battery Replacement
When the display dims or the clock functions become erratic while on battery power, it is time to replace the batteries. Open the battery compartment, remove the old AA batteries, and insert new ones, ensuring correct polarity. Dispose of old batteries responsibly according to local regulations.
5. Troubleshooting
- Display is blank or dim:
- Check battery power. Replace batteries if necessary.
- If using USB power, ensure the cable is securely connected and the power adapter is functional.
- If on battery power, activate the display by touch or sound.
- Clock not keeping accurate time:
- Reset the time as per Section 3.1.
- Ensure stable power supply (fresh batteries or reliable USB connection).
- Alarm not sounding:
- Verify the alarm is activated (check for the alarm indicator on the display).
- Ensure the alarm time is set correctly.
- Sound/Touch activation not working:
- This feature primarily functions when the clock is powered by batteries. Ensure batteries are fresh.
- Check if the clock is in a mode that disables this feature (refer to advanced settings if available, though not detailed in basic product info).
6. Specifications
| Feature | Specification |
|---|---|
| Model Number | KA5805WD |
| Brand | Karlsson |
| Color | Black |
| Material | Plastic |
| Dimensions (L x W x H) | 19.2 x 3.81 x 14.2 cm |
| Item Weight | 190 grams |
| Display Type | Digital |
| Power Source | Battery Powered (3x AA, not included) / USB DC 5V |
| Special Features | Alarm, Time, Date, Day, Temperature Display, Sound/Touch Activation |
7. Warranty and Support
7.1 Warranty Information
This Karlsson product is covered by a standard manufacturer's warranty against defects in materials and workmanship. Please retain your proof of purchase for warranty claims. Specific warranty duration and terms may vary by region and retailer. For detailed warranty information, please refer to the documentation provided at the time of purchase or contact your retailer.
7.2 Customer Support
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact your point of purchase or visit the official Karlsson website for support resources. Ensure you have your model number (KA5805WD) and proof of purchase ready when contacting support.





