Introduction
This manual provides detailed instructions for the operation and maintenance of your SWOFY M503 MP3 Player. Please read this manual thoroughly before using the device to ensure proper functionality and to maximize your user experience.

Image: The SWOFY M503 MP3 Player screen showing the Hiby Music Player app, illustrating support for various audio formats like MP3, WAV, APE, FLAC, AAC, OGG, and WMA.
What's in the Box
Verify that all items are present in the package:
- SWOFY M503 MP3 Player (80GB)
- USB Type-C Cable
- Wired Earbuds
- User Manual (this document)
- Screen Protector
- Protective Case
- 64GB SD Card (pre-installed or included separately)

Image: The complete packing list for the SWOFY M503 MP3 Player, showing the device, USB Type-C cable, wired earphones, screen protector, protective case, user manual, and a 64GB SD card.
Setup
1. Charging the Device
Before first use, fully charge your MP3 player. Connect the provided USB Type-C cable to the player's charging port and the other end to a USB power adapter (not included) or a computer's USB port. The charging indicator will show the charging status. A full charge typically takes approximately 2 hours.

Image: A visual representation of the SWOFY M503 MP3 Player's 2000mAh battery, indicating up to 50 hours of music playback (with wired earbuds) or 8 hours of video playback on a single charge.
2. Powering On/Off
- To Power On: Press and hold the power button located on the side of the device until the screen illuminates.
- To Power Off: Press and hold the power button, then select "Power Off" from the options that appear on the screen.
3. Expanding Storage (Micro SD Card)
The player comes with 16GB internal storage and a 64GB SD card, providing a total of 80GB. You can expand the storage further up to 1TB using a compatible Micro SD card. Locate the Micro SD card slot on the device, gently insert the card until it clicks into place. Ensure the player is powered off before inserting or removing the SD card.

Image: The SWOFY M503 MP3 Player highlighting its internal components (Android 9.0, MTK 8-Core, 2GB RAM, 16GB ROM) and the Micro SD card slot, demonstrating storage expansion capability with a 64GB SD card, up to 1TB.
4. Connecting to Wi-Fi
- From the home screen, tap the "Settings" icon.
- Select "Network & Internet" or "Wi-Fi".
- Toggle Wi-Fi to "On".
- Select your desired Wi-Fi network from the list.
- Enter the network password if prompted, then tap "Connect".
5. Bluetooth Pairing
- Ensure the Bluetooth device (headphones, speaker) is in pairing mode.
- On your MP3 player, go to "Settings" > "Connected devices" > "Bluetooth".
- Toggle Bluetooth to "On".
- The player will scan for available devices. Select your device from the list.
- Confirm the pairing on both devices if a passkey is displayed.

Image: The SWOFY M503 MP3 Player displayed alongside wireless earbuds, demonstrating its Bluetooth connectivity feature for audio output.
Operating Instructions
1. Basic Navigation
The SWOFY M503 features a 4-inch high-definition touch screen. Navigate by tapping icons, swiping left/right for different screens, and swiping down from the top for quick settings and notifications. Use the back button (usually a triangle icon) at the bottom of the screen to return to the previous page.
2. Music Playback
The player supports various audio formats including MP3, WAV, FLAC, AAC, APE, OGG, M4A, WMA, MP2. You can play local music files or stream from pre-installed apps.
- Local Music: Use the pre-installed music player app. You can scan for music files on your device and SD card, create playlists, and search for songs by name.
- Streaming Apps: Access pre-installed apps like Spotify, Pandora, Amazon Music, Spotify Kids, Tidal, and Deezer via Wi-Fi. Ensure you are logged into your respective accounts.
3. Video Playback
The device supports 720p and 1080p video playback and various formats including RM, AVI, RMVB, FLV, MP4, DAT, MKV, MPG, MOV, TS. Use the pre-installed video player app to watch videos stored on your device or SD card.

Image: A user viewing a video on the 4-inch high-definition screen of the SWOFY M503 MP3 Player, showcasing its 1080P HD full format video playback capabilities.
4. App Management and Parental Controls
The player runs on Android 9.0 and allows installation and uninstallation of apps. It includes a parental control feature.
- Installing/Uninstalling Apps: Use the pre-installed app store to download new applications. To uninstall, press and hold the app icon, then drag it to the uninstall option.
- Parental Controls: Enable parental controls in the settings to restrict app downloads and usage. This feature requires a password to authorize app installations, ensuring a suitable environment for children.
- Note: This MP3 player does not include Google Play Services and cannot install apps that require its support, such as YouTube or YouTube Music.

Image: The SWOFY M503 MP3 Player's home screen, showing pre-installed applications such as Spotify, Deezer, Audible, Amazon Music, and a generic app store icon, indicating app management functionality.
5. Other Features
The device includes several practical applications:
- Voice Recorder: For recording audio.
- FM Radio: For listening to local radio stations.
- Ebook Reader: For reading digital books.
- File Transfer: Connect to a computer via USB to transfer files.
- Clock, Calendar, Calculator, Gallery, File Manager: Standard utility apps.
- Audiobook Apps: Pre-installed apps like Audible, Audiobooks, Libby, LibriVox, and Kindle for listening to audiobooks.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Avoid liquid cleaners or abrasive materials.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge the device regularly. Do not expose the device to extreme temperatures.
- Software: While the device runs Android 9.0, system updates may not be available. Keep your installed applications updated through their respective app stores.
Troubleshooting
| Issue | Possible Solution |
|---|---|
| Device does not power on. | Ensure the battery is charged. Connect the player to a charger for at least 10 minutes, then try powering on again. |
| Cannot connect to Wi-Fi. | Check if Wi-Fi is enabled in settings. Verify the Wi-Fi password. Restart the player and your Wi-Fi router. |
| Bluetooth device not pairing. | Ensure the Bluetooth device is in pairing mode and within range. Turn Bluetooth off and on again on the player. |
| Apps are slow or crashing. | Close unnecessary background apps. Clear app cache in settings. Ensure sufficient storage space is available. Restart the device. |
| Cannot transfer files to/from computer. | Ensure the USB cable is securely connected. On the player, swipe down from the top and select "USB for file transfer" or "MTP mode". |
| Music files not appearing. | Ensure files are in a supported format. Use the music app's scan feature to detect new files. Check if the SD card is properly inserted. |
Specifications
| Feature | Detail |
|---|---|
| Model Number | M503 |
| Brand | SWOFY |
| Operating System | Android 9.0 |
| Processor | MTK 8-Core |
| RAM | 2GB |
| Internal Storage | 16GB (Total 80GB with included 64GB SD card) |
| Expandable Storage | Up to 1TB via Micro SDHC card |
| Screen Size | 4 Inches |
| Screen Resolution | 480*800px |
| Connectivity | Wi-Fi (Dual Band 2.4 & 5GHz), Bluetooth 4.2 (two-way), USB 2.0 (Type-C) |
| Battery Capacity | 2000mAh Lithium Battery |
| Music Playback Time | Up to 50 hours (wired earbuds) |
| Video Playback Time | Up to 8 hours |
| Charging Time | Approximately 2 hours (Type-C) |
| Supported Audio Formats | MP3, WAV, FLAC, AAC, APE, OGG, M4A, WMA, MP2, etc. |
| Supported Video Formats | RM, AVI, RMVB, FLV, MP4, DAT, MKV, MPG, MOV, TS |
| Special Features | Built-In Speaker, Equalizer, FM Radio, Touch Screen, Video Playback, Voice Recorder, Ebook Reader, Parental Controls |
| Dimensions | 2.75 x 1.96 x 0.39 inches |
| Item Weight | 1.6 ounces |
Warranty and Support
Your SWOFY M503 MP3 Player comes with a 1-year warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use. It does not cover damage caused by misuse, accidents, or unauthorized modifications.
For technical assistance, troubleshooting, or warranty claims, please contact SWOFY customer service. Our support team is available for 12-hour customer service to assist you with any inquiries.
Please refer to your purchase documentation or the SWOFY official website for specific contact details.





