1. Introduction
Thank you for purchasing the Heayzoki K605 Portable Digital Tuning Radio Receiver. This device combines a multi-band radio with an MP3 player, offering versatility and portability. Please read this manual carefully to ensure proper use and to maximize your enjoyment of the product.

Image: The Heayzoki K605 portable radio, highlighting its compact and lightweight design.
Key Features:
- Compact and portable design for easy carrying.
- MP3 playback mode supporting WAV and MP3 formats.
- Memory card support for audio playback.
- FM stereo reception for improved sound clarity.
- High sensitivity and good selectivity for clear reception.
- Simple and intuitive operation, suitable for all ages.
2. Safety Information
To prevent damage and ensure safe operation, please observe the following precautions:
- Do not expose the device to extreme temperatures, direct sunlight, or high humidity.
- Avoid dropping or subjecting the device to strong impacts.
- Do not disassemble or attempt to repair the device yourself. Refer all servicing to qualified personnel.
- Keep the device away from water and other liquids.
- Use only the specified battery and charging accessories.
- When using earphones, keep the volume at a moderate level to prevent hearing damage.
3. Package Contents
Verify that all items are present in the package:
- Heayzoki K605 Portable Radio Receiver
- Rechargeable Battery (pre-installed or separate)
- USB Charging Cable
- Earphones
- Owner's Manual (this document)

Image: The Heayzoki K605 radio displayed with its accessories, including earphones and a charging cable.
4. Product Overview
Familiarize yourself with the buttons and ports of your K605 radio.

Image: Front view of the K605 radio, highlighting the LCD screen and speaker.

Image: Side view of the K605 radio, illustrating the control buttons for tuning and volume.

Image: Rear view of the K605 radio, showing the battery compartment and additional ports.
Controls and Ports:
- LCD Display: Shows frequency, time, battery status, and MP3 track information.
- Power Button: Turns the device on/off.
- Mode Button: Switches between FM, SW, MW radio, and MP3 player modes.
- Volume +/- Buttons: Adjusts the audio volume.
- Tuning +/- Buttons: Scans or manually tunes radio frequencies; navigates MP3 tracks.
- Play/Pause Button: Controls MP3 playback.
- Antenna: Extendable antenna for improved radio reception.
- Earphone Jack (3.5mm): For private listening.
- Micro USB Port: For charging the device.
- Memory Card Slot: For inserting a microSD card with MP3/WAV files.
5. Setup
5.1. Charging the Battery
- Connect the small end of the USB charging cable to the Micro USB port on the radio.
- Connect the larger end of the USB charging cable to a USB power adapter (not included) or a computer's USB port.
- The battery indicator on the LCD display will show charging status.
- Once fully charged, disconnect the charging cable.
5.2. Inserting a Memory Card (for MP3 Playback)
- Locate the memory card slot on the side or back of the radio.
- Gently insert a microSD card (up to 32GB, not included) with the metal contacts facing down until it clicks into place.
- To remove, push the card in slightly until it clicks out.
6. Operating Instructions
6.1. Power On/Off
Press and hold the Power button to turn the radio on or off.
6.2. Selecting Modes
Press the Mode button repeatedly to cycle through the available modes: FM Radio, SW Radio, MW Radio, and MP3 Player.
6.3. Radio Operation (FM/SW/MW)
- Extend the Antenna: For optimal reception, fully extend the telescopic antenna.
- Select Band: Press the Mode button until the desired band (FM, SW, or MW) is displayed.
- Automatic Tuning: Press and hold the Tuning +/- buttons to automatically scan for the next available station.
- Manual Tuning: Briefly press the Tuning +/- buttons to fine-tune the frequency step by step.
- Volume Adjustment: Use the Volume +/- buttons to adjust the sound level.

Image: The K605 radio with its antenna extended, ready for radio reception.
6.4. MP3 Player Operation
Ensure a memory card with MP3 or WAV files is inserted.
- Select MP3 Mode: Press the Mode button until "MP3" or similar is displayed.
- Play/Pause: Press the Play/Pause button to start or pause playback.
- Next/Previous Track: Use the Tuning +/- buttons to skip to the next or previous track.
- Volume Adjustment: Use the Volume +/- buttons to adjust the sound level.

Image: The K605 radio in MP3 playback mode, showing the MP3 indicator on the display.
6.5. Using Earphones
Plug your 3.5mm earphones into the earphone jack for private listening. The internal speaker will automatically mute.
7. Maintenance
7.1. Cleaning
- Wipe the device with a soft, dry cloth.
- Do not use abrasive cleaners, solvents, or strong chemicals.
7.2. Storage
- Store the radio in a cool, dry place away from direct sunlight and extreme temperatures.
- If storing for an extended period, ensure the battery is partially charged and recharge it periodically to maintain battery health.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Battery is depleted. | Charge the battery using the provided USB cable. |
| Poor radio reception | Antenna not extended; weak signal; interference. | Fully extend the antenna. Try repositioning the radio. Move away from electronic devices causing interference. |
| MP3 files not playing | Memory card not inserted correctly; unsupported file format; corrupted files. | Ensure the memory card is properly inserted. Verify files are in WAV or MP3 format. Try another memory card or re-format the current one. |
| No sound from speaker/earphones | Volume is too low; earphones not fully plugged in; faulty earphones. | Increase the volume. Ensure earphones are fully inserted. Test with another pair of earphones. |
9. Specifications
| Feature | Detail |
|---|---|
| Model | K605 |
| Brand | Heayzoki |
| Radio Bands Supported | FM, SW, MW (3-Band) |
| FM Frequency Range | 76-108 MHz |
| MW Frequency Range | 522-1620 KHz (9KHz) / 520-1710 KHz (10KHz) |
| SW Frequency Range | 4.75-21.85 MHz |
| Audio Formats Supported | WAV, MP3 |
| Connectivity Technology | 3.5 mm audio |
| Display Type | LCD |
| Power Source | Battery Powered (500mA 3.7V Lithium battery) |
| Speaker Maximum Output Power | 2 Watts |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Product Dimensions | 1 x 1 x 1 cm |
| Item Weight | 156 Grams |
10. Warranty Information
Heayzoki products are designed and manufactured to the highest quality standards. This product is covered by a limited warranty against defects in materials and workmanship for a period specified by your retailer or local laws from the original date of purchase. Please retain your proof of purchase for warranty claims. The warranty does not cover damage caused by misuse, accident, unauthorized modification, or normal wear and tear.
11. Customer Support
If you encounter any issues or have questions regarding your Heayzoki K605 Portable Digital Tuning Radio Receiver that are not addressed in this manual, please contact your retailer or the Heayzoki customer support team for assistance. Please have your model number and purchase details ready when contacting support.
For more information, you may visit the Heayzoki Store on Amazon.