1. Introduction
This manual provides detailed instructions for the operation and maintenance of your HIFI WALKER H20 Pro Hi-Res MP3 Player. Please read this manual thoroughly before using the device to ensure proper functionality and to maximize your audio experience.
2. Package Contents
Verify that all items are present in the package:
- HIFI WALKER H20 Pro MP3 Player
- 128GB SD Card
- USB Type-C Charging Cable
- User Manual
- Storage Bag

Image: Contents of the HIFI WALKER H20 Pro package.
3. Device Overview
The HIFI WALKER H20 Pro features a robust design with intuitive controls and versatile connectivity.
3.1 Physical Features
- 3.2-inch Full Touchscreen: For navigation and control.
- ALPS Mechanical Volume Knob: Provides precise and responsive volume control.
- Physical Buttons: For power, play/pause, and track navigation.
- 3.5mm Single-Ended Output: Standard headphone jack.
- 4.4mm Balanced Output: For enhanced audio quality with compatible headphones.
- USB Type-C Port: For charging, data transfer, and USB DAC functionality.

Image: Front and back view of the HIFI WALKER H20 Pro.

Image: Detailed view of the H20 Pro's audio output ports and USB-C port.

Image: The H20 Pro's touchscreen and side controls.
4. Setup
4.1 Charging the Device
Before first use, fully charge the H20 Pro. Connect the included USB Type-C cable to the device and a compatible USB power adapter (not included) or a computer's USB port. The charging indicator will show the charging status.

Image: The H20 Pro connected for charging.
4.2 Inserting the Micro SD Card
The H20 Pro supports Micro SD cards up to 512GB. A 128GB SD card is included. Locate the Micro SD card slot on the device. Gently insert the card with the gold contacts facing down until it clicks into place. To remove, push the card in slightly until it springs out.

Image: Inserting a Micro SD card into the H20 Pro.
4.3 Powering On/Off
- To Power On: Press and hold the Power button until the screen illuminates.
- To Power Off: Press and hold the Power button, then select 'Power Off' on the screen. A short press of the Power button will turn the screen on/off during operation.
4.4 Initial Configuration
Upon first power-on, you may be prompted to select your preferred language and set the date and time. Follow the on-screen instructions.
5. Operating Instructions
5.1 Basic Navigation
Navigate the H20 Pro using the 3.2-inch touchscreen. Swipe to scroll through menus and tap to select options. The physical buttons on the side provide quick access to power, play/pause, and track skipping.
5.2 Music Playback
The H20 Pro supports a wide range of high-resolution audio formats, including FLAC, WAV, APE, DSF, DFF, ISO, M4A, and MP3. It also features gapless playback for seamless transitions between tracks.
- Browsing Music: Access your music library through categories like Artist, Album, Genre, or Folder.
- Playing Music: Tap on a song to begin playback. Use the on-screen controls or physical buttons for play/pause, skip forward/backward.
- Volume Control: Adjust the volume using the ALPS mechanical rotary knob on the side of the device.

Image: The H20 Pro's music playback interface and supported audio formats.
5.3 Bluetooth Connectivity
The H20 Pro features bi-directional Bluetooth 5.1, allowing it to act as both a transmitter and a receiver. It supports high-quality codecs such as LDAC, aptX, AAC, and SBC.
- Transmitter Mode (Connecting to Bluetooth Headphones/Speakers):
- Go to Bluetooth settings on the H20 Pro.
- Enable Bluetooth and scan for devices.
- Put your Bluetooth headphones or speaker into pairing mode.
- Select your device from the list to connect.
- Receiver Mode (Using H20 Pro as a Bluetooth DAC):
- In Bluetooth settings, enable receiver mode.
- On your smartphone or other source device, search for the H20 Pro and connect.
- Audio from your source device will now play through the H20 Pro's outputs.

Image: The H20 Pro demonstrating Bluetooth connectivity with various devices.
5.4 Wired Audio Output
The H20 Pro offers both standard and balanced headphone outputs for optimal audio quality.
- 3.5mm Single-Ended Output: Connect standard headphones or earphones to this port.
- 4.4mm Balanced Output: Use this port with balanced headphones for improved channel separation, lower noise floor, and increased power output.

Image: Dual audio outputs for single-ended and balanced connections.
5.5 Sound Settings
Customize your listening experience with the H20 Pro's sound adjustment features.
- Equalizer (EQ): Access various preset EQ options (e.g., Rock, Classic, Jazz, Pop, Dance, Voice, Blues, Metal) or create custom settings to tailor the sound to your preference.
- MSEB EQ System: Utilize the advanced MSEB (Mage Sound 8-Ball) system for fine-tuning sound characteristics like overall temperature, bass extension, vocal thickness, and sibilance.

Image: The H20 Pro's MSEB sound adjustment interface.

Image: Available equalizer presets on the H20 Pro.
5.6 File Transfer
Transfer music and other files to your H20 Pro using the following methods:
- USB Connection: Connect the H20 Pro to your computer using the USB Type-C cable. The device will appear as a removable storage drive, allowing you to drag and drop files.
- Wi-Fi (HiBy Music App): The H20 Pro is compatible with the HiBy Music app. Connect the player to a Wi-Fi network and use the HiByLink feature within the app for wireless music transfer and remote control.
- OTG Function: The device supports OTG (On-The-Go) functionality, allowing direct connection to other USB storage devices for file transfer (requires an OTG adapter, not included).

Image: The H20 Pro in USB mode, connected to a computer.

Image: HiBy Music app compatibility for wireless control and transfer.

Image: The H20 Pro utilizing its OTG function for external storage.
5.7 Other Features
- E-book Function: The device supports reading e-books. Access this feature from the main menu.
- Idle Shutdown: Configure the device to automatically shut down after a period of inactivity to conserve battery.
- Screen Time Settings: Adjust the screen timeout duration.

Image: The H20 Pro's e-book reading feature.
6. Maintenance
6.1 Cleaning the Device
Use a soft, dry, lint-free cloth to clean the device. Avoid using abrasive cleaners, solvents, or aerosol sprays that may damage the surface or internal components.
6.2 Battery Care
To prolong battery life, avoid exposing the device to extreme temperatures. Charge the device regularly, but avoid leaving it fully discharged for extended periods. If storing the device for a long time, charge it to approximately 50%.
6.3 Firmware Updates
Periodically check the official HIFI WALKER website for available firmware updates. Updates can improve performance, add new features, and resolve issues. Follow the instructions provided with the firmware update carefully.
7. Troubleshooting
If you encounter issues with your HIFI WALKER H20 Pro, refer to the following common problems and solutions:
- Device will not power on:
Ensure the device is fully charged. Connect it to a power source and wait a few minutes before attempting to power on again. If the issue persists, try a different charging cable or adapter. - Bluetooth connection is unstable or audio is choppy:
Try resetting the Bluetooth connection on both the H20 Pro and the connected device. Ensure there are no obstructions between the devices and that they are within the effective range. Update the device firmware if available. - Album art or screen saver displays incorrectly:
Ensure your album art files are correctly embedded within your music files or placed in the same folder as the music. Some display issues may be resolved with firmware updates. - Equalizer settings reset after device sleeps:
This may be a software behavior. Check for firmware updates that might address this. Re-enable your preferred EQ settings after powering up the device. - Corrupted Micro SD card:
If the included SD card is corrupted, try formatting it on a computer or replacing it with a new Class 10 or higher Micro SD card. Ensure the card is properly inserted. - Back glass cracking:
The device features a glass back panel. To prevent damage, handle the device with care and consider using a protective case. Avoid placing it under pressure or in environments with extreme temperature fluctuations.
8. Specifications
Key technical specifications for the HIFI WALKER H20 Pro:
| Feature | Specification |
|---|---|
| Model Name | H20 Pro |
| DAC Chips | Dual ES9219C |
| Hi-Res Audio Support | DSD256, 32bit/192kHz |
| Bluetooth Version | 5.1 (Bi-directional) |
| Bluetooth Codecs | LDAC, aptX, AAC, SBC |
| Audio Outputs | 3.5mm Single-Ended, 4.4mm Balanced |
| Screen Size | 3.2 Inches |
| Internal Memory | None (relies on Micro SD) |
| Expandable Memory | Micro SD up to 512GB |
| Connectivity Technology | Wi-Fi, USB Type-C |
| Battery | 1 Lithium Polymer (included) |
| Item Weight | 3.52 ounces |
| Compatible Devices | Windows XP/Vista, Win7/8.1/10, macOS 10 and above |

Image: Dual ESS ES9219C DAC chips for high-fidelity audio.

Image: Detailed specifications for high-resolution audio performance.
9. Warranty and Support
9.1 Warranty Information
The HIFI WALKER H20 Pro comes with a standard manufacturer's warranty. Please refer to the warranty card included in your package for specific terms, conditions, and duration. Keep your proof of purchase for warranty claims.
9.2 Customer Support
For technical assistance, troubleshooting not covered in this manual, or warranty inquiries, please contact HIFI WALKER customer support. Contact details can typically be found on the official HIFI WALKER website or on the warranty card.





