Introduction
This manual provides detailed instructions for the operation and maintenance of your RUIZU 64GB Clip MP3 Player. Please read this manual thoroughly before using the device to ensure proper function and to maximize your listening experience. Keep this manual for future reference.
Package Contents
- RUIZU 64GB Clip MP3 Player
- USB-C Charging Cable
- User Manual
Note: Headphones and Micro SD card are not included.
Device Layout and Controls
Familiarize yourself with the buttons and ports on your RUIZU MP3 player.

Image: Device Controls Overview
This image illustrates the location and function of each button and port on the RUIZU Clip MP3 Player. Key controls include Menu, Return, Play/Pause/Enter, navigation buttons, volume controls, a MicroSD card slot, and a Type-C charging port.
- Power Button: Press and hold to turn on/off. Short press to lock/unlock screen.
- Menu Button (☰): Access the main menu or options within a sub-menu.
- Return Button (↩): Go back to the previous screen/menu.
- Play/Pause/Enter Button (▶): Play/pause music, confirm selection.
- Previous Track (◀◀): Short press for previous track, long press for fast rewind.
- Next Track (▶▶): Short press for next track, long press for fast forward.
- Scroll Up (▲): Navigate up in menus.
- Scroll Down (▼): Navigate down in menus.
- Volume +: Increase volume.
- Volume -: Decrease volume.
- MicroSD Card Slot: Insert a Micro SD card for expanded storage.
- Type-C Port: For charging and data transfer.
Setup
1. Charging the Device
Before first use, fully charge the MP3 player. Connect the provided USB-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.

Image: Charging the MP3 Player
This image illustrates the RUIZU MP3 player connected to a charging cable, showing the charging process. A full charge takes approximately 1.5 hours and provides up to 24 hours of playback.
- A full charge typically takes about 1.5 hours.
- The battery indicator on the screen will show charging status.
- The device offers up to 24 hours of playback on a full charge.
2. Powering On/Off
To power on, press and hold the Power button until the screen lights up. To power off, press and hold the Power button until the "Power Off" option appears, then select it.
3. Transferring Music Files
Connect the MP3 player to your computer using the USB-C cable. The device will appear as a removable disk. You can then drag and drop music files (MP3, WMA, WAV, FLAC, etc.) directly into the player's storage or an inserted Micro SD card folder.

Image: Transferring Music and Expandable Storage
This image demonstrates how to transfer music files from a computer to the RUIZU MP3 player using a USB-C cable. It also highlights the player's compatibility with various audio formats and its expandable storage capacity up to 128GB via a Micro SD card.
- The player has 64GB of built-in storage.
- Supports Micro SD cards up to 128GB (not included) for additional storage.
- Compatible audio formats include MP3, WMA, WAV, FLAC.
4. Inserting a Micro SD Card
Locate the Micro SD card slot on the side of the device. Gently insert the Micro SD card with the gold contacts facing down until it clicks into place. To remove, push the card in slightly until it springs out.
Operating Instructions
1. Basic Music Playback
From the main menu, navigate to "Music" and press the Play/Pause/Enter button. You can browse by "All songs," "Artists," "Albums," or "Genres."

Image: Simple Playback Steps
This image illustrates the straightforward process of playing music: power on the device, navigate to your music selection, and press play. The screen displays current track information and playback options.
- Press Play/Pause/Enter to play or pause the current track.
- Press Next Track or Previous Track to skip songs.
- Long press Next Track or Previous Track to fast forward or rewind.
- Use Volume + and Volume - buttons to adjust the sound level.
2. Bluetooth Pairing
The RUIZU MP3 player features Bluetooth 5.3 for wireless audio. It is compatible with Bluetooth headphones and speakers only.

Image: Wireless Listening via Bluetooth
This image depicts the RUIZU MP3 player in use with wireless earbuds, emphasizing its Bluetooth 5.3 capability for pure wireless listening. It also clarifies that the device connects only to Bluetooth headphones and speakers.
- Go to the "Bluetooth" menu on your MP3 player.
- Turn on Bluetooth.
- Ensure your Bluetooth headphones or speaker are in pairing mode.
- Select "Search for devices" on the MP3 player.
- Choose your device from the list to connect. The player supports auto-reconnect.
3. FM Radio
To use the FM Radio function, ensure wired headphones are connected as they act as the antenna. Navigate to "FM Radio" from the main menu. You can auto-scan for stations or manually tune.
4. Voice Recorder
Select "Recorder" from the main menu. Choose "Start Voice Recording" to begin. Press Play/Pause/Enter to pause/resume, and Menu to save the recording.
5. A-B Repeat Function
This feature is useful for language learning or reviewing specific audio segments. During music playback, press the Menu button and select "A-B Repeat." Press Play/Pause/Enter at the start point (A) and again at the end point (B) of the desired segment. The player will loop this section.
6. Shuffle Playback
To enable shuffle mode, navigate to the music playback screen, press the Menu button, and select the shuffle icon or option to randomize the playback order of your songs.
7. Sleep Timer
The sleep timer allows the device to automatically power off after a set period, conserving battery and providing a convenient way to listen before sleep.

Image: Sleep Timer Function
This image shows the RUIZU MP3 player's sleep timer settings, offering options for automatic power-off after various durations. This feature is ideal for listening to music before sleep.
- From the main menu, go to "Settings" or "System Settings."
- Find "Sleep Timer" or "Auto-Off."
- Select your desired duration (e.g., 5, 10, 20, 30 minutes).
8. Using the Built-in Clip
The MP3 player features a built-in clip for hands-free portability. Attach it securely to your clothing, belt, or bag strap during activities like running, walking, or working out.

Image: Clip-On Design for Active Use
This image demonstrates the versatility of the RUIZU MP3 player's built-in clip, showing individuals using it during various activities. The lightweight design (29g) allows for secure attachment and freedom of movement.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Avoid liquid cleaners or abrasive materials.
- Storage: Store the player in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge the device regularly, even if not in use for extended periods.
- Water Resistance: This device is not waterproof. Avoid exposure to water or high humidity.
Troubleshooting
| Problem | Solution |
|---|---|
| Device won't turn on. | Ensure the battery is charged. Connect to a power source and try again. |
| Cannot connect to Bluetooth headphones. |
|
| No music playing after transfer. |
|
| Screen is unresponsive. | Press and hold the Power button for 10-15 seconds to force a restart. |
| FM Radio not working. | Ensure wired headphones are connected, as they serve as the antenna. |
Specifications
| Feature | Detail |
|---|---|
| Brand | RUIZU |
| Model Number | THX52ProCABlk |
| Memory Storage Capacity | 64 GB (Built-in) |
| Expandable Storage | Supports Micro SD card up to 128 GB (not included) |
| Bluetooth Version | 5.3 |
| Screen Size | 1.5 inches |
| Audio Formats | MP3, WMA, WAV, FLAC |
| Battery Life | Up to 24 hours playback |
| Charging Time | Approx. 1.5 hours |
| Additional Features | FM Radio, Voice Recorder, A-B Repeat, Shuffle Playback, Sleep Timer, Built-in Clip |
Warranty and Support
RUIZU products are designed and manufactured to the highest quality standards. This product is covered by a standard manufacturer's warranty against defects in materials and workmanship from the date of purchase. Please refer to the warranty card included in your package for specific terms and conditions.
For technical support, troubleshooting assistance, or warranty claims, please contact RUIZU customer service through the retailer where you purchased the product or visit the official RUIZU website for contact information.







