1. Introduction
Thank you for purchasing the Diofox M8 Android 9.0 MP3 Player. This device combines advanced audio playback with smart features, offering a versatile entertainment experience. This manual provides detailed instructions to help you get started and make the most of your new device.

2. Package Contents
Please check the package for the following items:
- MP3 Player x 1
- Wired headphones x 1
- USB-C cable x 1
- User's Manual x 1
- Protective film x 1
- 64GB SD card x 1 (pre-installed or included separately)

3. Device Layout and Buttons
Familiarize yourself with the physical components and controls of your Diofox M8 player.

Buttons and Ports:
- **Volume +:** Increase volume.
- **Volume -:** Decrease volume.
- **Reset:** Used to reset the device in case of crashes or freezes.
- **Power on/off:** Press and hold to power on/off.
- **Home Button:**
- Press once to return to the previous menu.
- Press twice to go to the home menu.
- Long press to access the background program.
- **Recording hole:** Microphone for audio recording.
- **3.5mm output:** Audio jack for wired headphones.
- **USB-C port:** For charging and data transfer.
- **Speaker:** Built-in speaker for audio output.
- **TF card slot:** For inserting a microSD card for expanded storage.
4. Getting Started
4.1 Charging the Device
Before first use, fully charge your Diofox M8 player. New batteries require several charging and discharging cycles to reach optimal performance.
- Connect the device to a wall charger or a computer using the provided USB-C cable.
- The charging indicator will show the charging status.
- If the device is not used for a long time, charge and discharge it at least once a month to prevent battery damage from over-consumption.

4.2 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, then select "Power off" from the options.
4.3 Basic Gesture Operations
- **Long press:** Press and hold icons for 2 seconds. Long press a blank area on the main screen to enter editing mode.
- **Slide:** Swipe your finger across the screen to navigate.
- **Drag:** Long press an icon and drag it to a different position on the screen.
5. Operating the Device
5.1 Wi-Fi Connectivity
To connect to a Wi-Fi network:
- Turn on WLAN in the Settings menu. You can also swipe down from the status bar to open the notification panel and access Wi-Fi settings.
- Tap on the desired WLAN network to connect.
- If the network is encrypted, enter the password when prompted.
5.2 Bluetooth Pairing
To pair with a Bluetooth device:
- Turn on Bluetooth in the Settings menu. The device will automatically search for available devices.
- Select the desired Bluetooth device from the list.
- Follow any on-screen prompts to complete the pairing process.

5.3 Display Settings
- **Brightness level:** Adjust the screen brightness.
- **Night light:** Set a schedule for night light status and adjust its intensity.
- **Simulate color space:** Options include Disabled, Monochromacy.
- **Wallpaper:** Select from Gallery, Live Wallpapers, or other wallpaper options.
- **Sleep:** Configure the screen timeout duration (e.g., 15 seconds, 1 minute, 5 minutes).
- **Auto-rotate screen:** Enable or disable automatic screen rotation.
- **Font size:** Adjust the text size (Small, Default, Large, Largest).
- **Display size:** Adjust the overall display element size (Small, Default, Large).

5.4 Sound Settings
Adjust various sound parameters:
- **Media volume, Notification volume, Alarm volume:** Set individual volume levels.
- **Default alarm sound:** Choose your preferred alarm sound.
- **Screen locking sound, Charging sound, Touch sounds:** Enable or disable these feedback sounds.
- **Sound enhancement:** Access additional audio optimization options.
5.5 Storage Management
View the available and total space of internal storage and the inserted SD card. You can also see the storage occupancy of each application.
The device comes with 16GB internal ROM and a complimentary 64GB SD card, totaling 80GB. It supports external storage expansion up to 1TB.
5.6 Security Settings
- **Screen lock:** Set a screen lock using Swipe, Pattern, PIN, or Password. Important: If setting a PIN or Password, write it down before confirming, as you will not be able to access the device if forgotten.
- **Passwords:** Choose whether to make passwords visible.
- **Encryption & Credential:** Manage storage type, trusted credentials, user credentials, and install from SD card.
5.7 System Settings
- **Language & input:** Set the device language and input method.
- **Keyboard & input methods:** Select Gboard to configure your preferred language for input.
- **Date & Time:** Set the device's date and time.
- **Reset options:** Erase all data and reset to factory settings. (See Troubleshooting for important notes).
- **About device:** View detailed information about your device.
5.8 Media Playback and Apps
The Diofox M8 supports a wide range of media formats and comes preloaded with popular streaming apps.

- **Music Playback:** The local music application features a graphic equalizer, supports various playlists, loop playback methods (looping list, individual loops, random, sequential), displays covers and lyrics, and allows searching. Supported formats include MP3, WAV, FLAC, AAC, APE, OGG, M4A, WMA, MP2.
- **Video Playback:** Enjoy videos in formats such as RM, RMVB, FLV, MP4, DAT, MKV, MPG, MOV, TS.
- **E-book Reading:** The device supports TXT format for e-books.
- **FM Radio:** Built-in FM radio functionality is available.
- **Recording:** Use the built-in microphone for audio recordings in AMR format.
- **Preloaded Apps:** Access Spotify, Pandora, Deezer, Amazon Music, Apple Music, YouTube, and more.

6. Maintenance
- **Battery Care:** To prolong battery life, avoid extreme temperatures. If not using the device for extended periods, charge and discharge it at least once a month.
- **Cleaning:** Use a soft, dry cloth to clean the device. Avoid liquid cleaners.
- **Environmental Conditions:** Do not expose the device to extreme temperatures (below -10°C or above 50°C), direct sunlight for prolonged periods, or water.
- **Avoid Thunderstorms:** Do not use the equipment during thunderstorms.
7. Troubleshooting
- **APK Installation Issues:** If a downloaded APK cannot be installed, try using a lower version of the APK.
- **Device Crashes/Freezes:** If the device crashes or freezes, perform a reset using the Reset button or restore factory settings. Note: Backup all your files before restoring factory settings, as they will be lost.
- **SD Card Not Recognized:** Try formatting the SD card on the device. If the issue persists, contact support.
- **Forgot Password:** The universal password to unlock the player is 1235789.
- **Screenshot:** Press and hold the "Power button" and "Volume -" button simultaneously to take a screenshot.
8. Specifications
| Feature | Description |
|---|---|
| Model Number | M8 |
| Operating System | Android 9.0 |
| Processor | MTK6750 Octa-core CPU |
| Display | 4.0 inches, 480*800 pixels, Full Touch Screen |
| Internal Memory | 2GB RAM + 16GB ROM (Hard disk type) |
| External Memory | 64GB SD card included, supports up to 1TB expansion |
| Connectivity | Wi-Fi (2.4GHz and 5GHz dual-band), Bluetooth (4.2) |
| USB Port | Type-C USB2.0 |
| Battery | 2000mAh Lithium Battery |
| Battery Life | Up to 50-52 hours (music playback), approx. 9 hours (video playback) |
| Charging | 5V DC, 1A |
| Dimensions (WxHxD) | 10.5 x 1.2 x 6.2 cm |
| Body Material | Plastic |
| Supported Audio Formats | MP3, OGG, FLAC, AAC, WAV, WMA, APE, M4A, MP2 |
| Supported Video Formats | RM, RMVB, FLV, MP4, DAT, MKV, MPG, MOV, TS |
| Supported Picture Formats | JPEG, BMP, GIF, PNG |
| Supported Ebook Formats | TXT |
| Supported Recording Formats | AMR |
| Compatible Devices | Android, Windows 7 and above |
| Operating Temperature | 0-45°C (32-113°F) |
| High-concerned chemical | None |
9. User Tips
- **Optimize Performance:** For smoother operation, regularly close background applications.
- **Battery Longevity:** To maximize battery life, consider reducing screen brightness and disabling Wi-Fi/Bluetooth when not in use.
- **Expand Storage:** Utilize the included 64GB SD card and consider upgrading to a larger one (up to 1TB) for extensive media libraries.
- **App Compatibility:** If an app doesn't install, try finding an older version of the APK, as newer versions might require higher Android OS versions than 9.0.
- **Easy Navigation:** The 4.0-inch full touch screen provides simple navigation; swipe and tap gestures are intuitive for managing your media and apps.
10. Support
If you have any questions or require further assistance with your Diofox M8 MP3 Player, please feel free to contact us:
- **Email:** Diofox23@outlook.com
For the complete user manual and additional documents, you can refer to the official PDF manual: Diofox M8 User Manual (PDF).




