1. Introduction
Thank you for purchasing the oein K11 Alarm Clock Speaker. This versatile device combines a digital alarm clock, Bluetooth-compatible speaker, and FM radio, along with convenient dual USB charging ports. This manual will guide you through the setup, operation, and maintenance of your new device to ensure optimal performance and enjoyment.
2. Safety Information
- Read all instructions carefully before use and retain for future reference.
- Do not expose the device to water, moisture, or extreme temperatures.
- Keep the device away from heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
- Use only attachments/accessories specified by the manufacturer.
- Unplug the device during lightning storms or when unused for long periods.
- Do not attempt to disassemble or repair the unit yourself. Refer all servicing to qualified service personnel.
3. Package Contents
- K11 Alarm Clock Speaker Unit
- Power Adapter Cable (approx. 125cm)
- Audio Cable (approx. 100cm)
- Button Cell Battery (pre-installed or included for backup)
- User Manual (this document)
4. Product Overview
Familiarize yourself with the various parts and controls of your K11 Alarm Clock Speaker.

This diagram illustrates the front, top, and rear views of the K11 speaker, highlighting its various buttons, ports, and features for easy identification and operation.
- Rotary Button
- Previous Song/Radio Channel Button
- Alarm 1 Setting Button
- Switching & Changing Button
- Alarm 2 Setting Button
- Next Song/Radio Channel Button
- Temperature Sensor
- Microphone
- USB Charging Port (USB1)
- USB Charging Port & U Disk Driver (USB2)
- Battery Holder
- Power Input Port (DC 5V)
- Sleep Button
- °C/°F Conversion Key
- Audio Input Port (AUX IN)
- TF Card Slot
5. Setup Instructions
5.1 Power Connection
- Connect the provided power adapter cable to the Power Input Port (12) on the back of the speaker.
- Plug the other end of the adapter into a standard wall outlet (100-240V, 50/60Hz).
- The device will power on and the LED display will light up.

The speaker requires continuous power via the adapter for full functionality, including charging external devices.
5.2 Setting Time and Date
To adjust the time and date:
- Press and hold the Rotary Button (1) until the time display flashes.
- Use the Previous/Next Song/Radio Channel Buttons (2, 6) or rotate the Rotary Button (1) to adjust the hour.
- Press the 'Switching & Changing Button' (4) to move to the minute setting.
- Adjust minutes using the Previous/Next Song/Radio Channel Buttons (2, 6) or rotate the Rotary Button (1).
- Repeat for date settings if applicable (day, month, year).
- Press the Rotary Button (1) or 'Switching & Changing Button' (4) again to confirm and exit time setting mode.
5.3 Setting Alarms
The device supports dual alarms.

Set two different wake-up times to suit your schedule.
- Press the Alarm 1 Setting Button (3) or Alarm 2 Setting Button (5) to select the alarm you wish to set. The alarm time will flash.
- Use the Previous/Next Song/Radio Channel Buttons (2, 6) or rotate the Rotary Button (1) to adjust the hour.
- Press the 'Switching & Changing Button' (4) to move to the minute setting.
- Adjust minutes using the Previous/Next Song/Radio Channel Buttons (2, 6) or rotate the Rotary Button (1).
- Press the 'Switching & Changing Button' (4) again to select the alarm sound (e.g., buzzer, FM radio).
- Press the Alarm Setting Button (3 or 5) again to confirm and activate the alarm.
5.4 Bluetooth Pairing
- Ensure the speaker is powered on.
- Press the 'Switching & Changing Button' (4) to switch to Bluetooth mode. The Bluetooth icon on the display will flash, indicating it's in pairing mode.
- On your mobile device, enable Bluetooth and search for available devices.
- Select "K11 Speaker" (or similar name) from the list.
- Once paired, the Bluetooth icon will stop flashing and remain solid. You can now play audio from your device through the speaker.
5.5 FM Radio Setup

The device features a smart radio function for easy operation.
- Press the 'Switching & Changing Button' (4) to switch to FM radio mode.
- To auto-scan and save stations, press and hold the 'Switching & Changing Button' (4) or the Play/Pause button (if available, not explicitly labeled) for a few seconds. The radio will scan and store available stations.
- Use the Previous/Next Song/Radio Channel Buttons (2, 6) to navigate through saved stations.
- Rotate the Rotary Button (1) to manually tune to a specific frequency.
5.6 U Disk Playback

Insert a U disk into the designated USB port to play your favorite music files.
- Insert a U disk (USB flash drive) containing audio files into the USB Charging Port & U Disk Driver (10).
- The device should automatically switch to U disk playback mode. If not, press the 'Switching & Changing Button' (4) until U disk mode is selected.
- Use the Previous/Next Song/Radio Channel Buttons (2, 6) to skip tracks.
- Rotate the Rotary Button (1) to adjust volume.
5.7 AUX Input
- Connect one end of the provided audio cable to the Audio Input Port (15) on the back of the speaker.
- Connect the other end to the audio output of your external device (e.g., MP3 player, computer).
- Press the 'Switching & Changing Button' (4) to switch to AUX mode.
- Play audio from your external device.
6. Operating Instructions
6.1 Adjusting Display Brightness

Adjust the display brightness to your preference for day or night viewing.
The LCD display has 4 levels of brightness. Press the 'Sleep Button' (13) or a dedicated brightness button (if available, not explicitly labeled) to cycle through the brightness levels.
6.2 Hands-Free Calling

The built-in microphone allows for clear communication.
When your phone is paired via Bluetooth:
- Answer Call: Press the Rotary Button (1) once to answer an incoming call.
- End Call: Press the Rotary Button (1) once during a call to end it.
- Reject Call: Press and hold the Rotary Button (1) for a few seconds to reject an incoming call.
6.3 Temperature Display
The device displays the ambient temperature via the Temperature Sensor (7).
- To switch between Celsius (°C) and Fahrenheit (°F), press the °C/°F Conversion Key (14).
6.4 Charging External Devices
You can charge your USB-powered devices using the two USB ports (9, 10).
- Connect your device's USB charging cable to either USB Charging Port (9) or USB Charging Port & U Disk Driver (10).
- Ensure the K11 speaker is connected to power.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the surface of the device. Do not use liquid cleaners or aerosol sprays.
- Storage: When not in use for extended periods, store the device in a cool, dry place away from direct sunlight.
- Battery: The button cell battery (in Battery Holder 11) is for maintaining time and alarm settings during power outages. Replace it when necessary, ensuring correct polarity.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Power adapter not connected or faulty. | Ensure the power adapter is securely connected to the device and a working power outlet. |
| No sound from speaker. | Volume too low; incorrect mode selected; device not paired (Bluetooth). | Increase volume using the Rotary Button (1). Check if the correct mode (Bluetooth, FM, U Disk, AUX) is selected. Re-pair Bluetooth device if necessary. |
| FM radio reception is poor. | Weak signal; antenna not extended. | Extend the FM antenna fully. Try repositioning the device for better reception. |
| USB charging not working. | Speaker not powered; faulty USB cable/device. | Ensure the speaker is connected to its power adapter. Try a different USB cable or device. |
| Time/Alarm settings lost after power off. | Button cell battery is dead or missing. | Replace the button cell battery in the Battery Holder (11). |
9. Specifications
| Feature | Detail |
|---|---|
| Model Number | K11 Alarm Clock Speaker |
| Brand Name | oein |
| Bluetooth Version | 4.2 |
| Input/Output | USB |
| Sound Mode | Standard Mode, Sleeping Mode, Stereo Sound Mode |
| Category | Speakers |
| Use | Home |
| Input Power (W) | 200-299W |
| Voice Control | Yes |
| Waterproof | No |
| Support APP | Yes |
| Inbox Adaptor | No |
| Intelligent Personal Assistant | None |
| Audio Crossover | Full-Range |
| Number of Loudspeaker Enclosure | 1 |
| Power Source | AC |
| Channels | 5 (4.1) |
| Battery | Yes (for backup) |
| Communication | USB, Bluetooth |
| Speaker Type | Portable |
| Cabinet Material | PVC |
| Origin | Mainland China |
| Certification | None |
| Style | Modern |
| FM Frequency Range | 87.5 - 108MHz |
| Audio Cable Length | Approx. 100cm |
| Adapter Cable Length | Approx. 125cm |
| Dimensions (L x W x H) | 9.8cm x 8.4cm x 6.7cm (3.9in x 3.3in x 2.6in) |

Detailed measurements of the device for placement and reference.
10. User Tips
- Time/Date Adjustment: If you find it difficult to adjust the time and date, refer to section 5.2 and ensure you are pressing and holding the correct button to enter setting mode, then using the navigation buttons to change values.
- FM Reception: For best FM radio reception, fully extend the antenna and try placing the speaker near a window or in an open area.
- Power Backup: The internal button cell battery is only for memory backup. The main functions require the device to be plugged into an AC power source.
11. Warranty and Support
This product is covered by a standard manufacturer's warranty against defects in materials and workmanship. For warranty claims or technical support, please contact your retailer or the manufacturer directly. Keep your proof of purchase for warranty service.
12. Product Video Overview
A brief video showcasing the features and design of the K11 Alarm Clock Speaker.





