1. Introduction
This manual provides detailed instructions for the operation and maintenance of your PINHUI 64GB MP3 Player with Bluetooth 5.3. Please read this manual thoroughly before using the device to ensure proper functionality and to maximize your user experience. Keep this manual for future reference.
2. Package Contents
Please check the package for the following items:
- PINHUI 64GB MP3 Player
- USB Type-C Charging Cable
- User Manual
3. Product Overview
Familiarize yourself with the device's physical components and controls.

Figure 3.1: Front and side view of the MP3 player with labeled controls and ports. Key controls include Menu, Volume Up/Down, Return, Next/Previous Song, Play/Pause, Power button, Headphone plug, and Type-C port. The TF card socket is located on the side.
- Menu Button: Accesses main menu or options within a function.
- Volume Up/Menu Up: Increases volume or navigates up in menus.
- Return Button: Goes back to the previous screen or menu.
- Next Song/Forward: Skips to the next track or fast-forwards.
- Previous Song/Retire: Skips to the previous track or rewinds.
- Play/Pause Button: Starts or pauses playback.
- Volume Down/Menu Down: Decreases volume or navigates down in menus.
- Power Button: Turns the device on/off or locks/unlocks the screen.
- Headphone Plug (3.5mm): Connect wired headphones.
- Type-C Port: For charging and data transfer.
- TF Card Socket: Insert a Micro SD card for expanded storage.
4. Getting Started
4.1. Charging the Device
Before first use, fully charge the MP3 player. Connect the included Type-C cable to the device's Type-C port and the other end to a USB power adapter (not included) or a computer's USB port. The battery indicator on the screen will show charging status. A full charge typically takes approximately 2 hours and provides up to 40 hours of playback.
4.2. Power On/Off
- To Power On: Press and hold the Power button for a few seconds until the screen lights up.
- To Power Off: Press and hold the Power button for a few seconds, then select 'Power Off' on the screen.
- Screen Lock/Unlock: Briefly press the Power button to lock or unlock the screen during operation.
4.3. Basic Navigation
Use the physical buttons (Menu, Return, Up/Down, Next/Previous, Play/Pause) to navigate through the menus and control playback. The screen displays icons for various functions such as Music, Recording, Bluetooth, Video, FM Radio, eBook, Speaker, Folder, Alarm Clock, and Pedometer.
5. Music Playback
The device supports MP3, WMA, APE, FLAC, WAV, DRM, and ACELP audio formats, offering HiFi lossless sound quality.

Figure 5.1: The main interface of the MP3 player showing icons for its various functions.
5.1. Transferring Music Files
Connect the MP3 player to your computer using the Type-C cable. The device will appear as a removable disk. Drag and drop your music files into the 'Music' folder on the player. You can also use a Micro SD card (up to 128GB, not included) for additional storage.
5.2. Playing Music
- From the main menu, select the 'Music' icon.
- Browse your music by Artist, Album, Songs, or Folders.
- Select a song to begin playback.
- Use the Play/Pause, Next/Previous, and Volume buttons to control playback.
5.3. Playback Modes
The player supports sequential play, shuffle repeat, single song repeat, and all song repeat modes. These options can typically be accessed within the music playback interface or settings.
6. Bluetooth Connectivity
The MP3 player features Bluetooth 5.3 for wireless audio streaming to compatible headphones or speakers. Note that this device acts as a Bluetooth transmitter, not a receiver.

Figure 6.1: The MP3 player connected wirelessly via Bluetooth to earbuds.
6.1. Pairing with Bluetooth Devices
- Ensure your Bluetooth headphones or speaker are in pairing mode.
- On the MP3 player, navigate to the 'Bluetooth' icon from the main menu and select it.
- Turn on Bluetooth. The player will search for nearby devices.
- Select your device from the list to pair. Once paired, the player will connect automatically in the future.
7. FM Radio
The built-in FM radio allows you to listen to local radio stations. Wired headphones must be connected as they act as the antenna.

Figure 7.1: User engaging with the FM radio and pedometer features simultaneously.
7.1. Using the FM Radio
- Connect wired headphones to the 3.5mm jack.
- From the main menu, select the 'FM Radio' icon.
- Use the navigation buttons to scan for stations or manually tune to a frequency.
- You can record FM programs by accessing the recording option within the FM radio interface.
8. Voice Recorder
The device includes a voice recorder function for capturing audio.

Figure 8.1: The MP3 player's voice recorder function in use.
8.1. Recording Audio
- From the main menu, select the 'Recording' icon.
- Select 'Start Recording' to begin.
- Press the Play/Pause button to pause/resume recording.
- Press the Return button to stop and save the recording.
9. Pedometer
Track your steps and activity with the built-in pedometer function.

Figure 9.1: The pedometer interface displaying step count.
9.1. Using the Pedometer
- From the main menu, select the 'Pedometer' icon.
- Start the pedometer function. The device will begin counting your steps.
- You can use the pedometer while listening to music or FM radio.
10. Other Functions
10.1. eBook Reader
The device supports reading TXT format e-books. Transfer TXT files to the 'eBook' folder on the player.

Figure 10.1: The MP3 player displaying an e-book.
10.2. Video Playback
The player supports video playback. Ensure video files are in a compatible format (e.g., AMV) and transferred to the 'Video' folder.
10.3. Built-in Speaker
The MP3 player includes a built-in speaker for audio playback without headphones.

Figure 10.2: Exploded view illustrating the built-in speaker.
10.4. Screen Lock
To prevent accidental presses, you can lock the screen by briefly pressing the Power button.

Figure 10.3: The MP3 player screen displaying the lock icon.
10.5. Additional Features
The player also includes functions such as Calendar, Stopwatch, Alarm Clock, Time Saver, Shutdown timer, AB Repeater, and Text Sync. Explore these features through the device's main menu.
11. File Management
Files can be transferred to the player via a computer or mobile phone using OTG (On-The-Go) functionality.

Figure 11.1: Illustrates file transfer between a smartphone and the MP3 player using OTG.
11.1. Using a Micro SD Card
Insert a Micro SD card into the TF card socket to expand storage capacity up to 128GB. Files can be managed directly on the card or transferred to the player's internal memory.
12. Settings
Access the 'Settings' menu from the main screen to customize various aspects of your player, including:
- Display: Adjust brightness, backlight timer.
- Sound: Equalizer settings, volume limits.
- Language: Select from 28 supported languages.
- Date & Time: Set current date and time.
- System Information: View firmware version and storage details.
- Factory Reset: Restore default settings (this will erase user data).
13. Troubleshooting
If you encounter issues with your MP3 player, refer to the following common problems and solutions:
| Problem | Solution |
|---|---|
| Device does not power on. | Ensure the device is fully charged. Connect to a power source and try again. If unresponsive, perform a hard reset (refer to manufacturer support if available). |
| Cannot connect to Bluetooth device. | Ensure both devices are in pairing mode and within range. Check if the Bluetooth device is already paired with another device. Restart both the MP3 player and the Bluetooth device. |
| No sound from headphones/speaker. | Check volume level. Ensure headphones are properly plugged in or Bluetooth is correctly paired. Test with different headphones/speakers. |
| Files not appearing on the player. | Verify file formats are supported. Ensure files were transferred to the correct folders. Disconnect and reconnect the player to the computer. |
| FM Radio not working. | Ensure wired headphones are connected, as they serve as the antenna. Try scanning for stations again in a different location. |
14. Specifications
- Internal Storage: 64 GB
- Expandable Storage: Supports Micro SD card up to 128 GB (not included)
- Connectivity: Bluetooth 5.3, USB Type-C, 3.5mm Audio Jack
- Supported Audio Formats: MP3, WMA, APE, FLAC, WAV, DRM, ACELP
- Supported Video Formats: AMV (specific format may vary, refer to device for details)
- Supported eBook Format: TXT
- Battery Life: Up to 40 hours (audio playback)
- Charging Time: Approximately 2 hours (via Type-C)
- Display: 1.8-inch LCD
- Dimensions: 9.4cm x 4.0cm (approximate, based on diagram)
- Weight: 6.7 ounces
- Special Features: Built-in Speaker, FM Radio, Voice Recorder, Pedometer, Equalizer, Multi-language support (28 languages)
15. Warranty and Support
PINHUI products are designed and manufactured to the highest quality standards. For warranty information and technical support, please refer to the documentation provided at the time of purchase or contact PINHUI customer service through their official channels. Keep your purchase receipt as proof of purchase for warranty claims.