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General| Brand | Ruizu |
|---|---|
| Model | D51 |
| Storage Capacity | 8GB |
| Battery | Built-in rechargeable lithium battery |
| FM Radio | Yes |
| Voice Recording | Yes |
| Earphone Output | 3.5mm |
| Display | 1.8 inch TFT |
| Expansion | Support microSD card up to 128GB |
| Audio Formats Supported | MP3, WMA, WAV, FLAC |
| Bluetooth | Yes, Bluetooth 4.2 |
Instructions on how to turn the mp3 player on and off using the power button.
Guidance on navigating the device's main menu and accessing its 9 functions.
How to adjust the sound volume using the device's volume buttons or interface.
Using buttons for fast rewind/forward and selecting the previous/next song.
Procedure to lock and unlock the device screen by pressing the power button.
Instructions for charging the mp3 player via USB cable or charger.
How to connect to Bluetooth devices such as speakers or headsets.
Accessing and playing music files, including volume and track navigation.
Playing video files and format requirements for AMV and AVI.
Using voice recording features, accessing recordings, and format settings.
Tuning, selecting stations, recording, and managing FM radio functions.
Reading TXT format articles and navigating through ebook content.
Viewing image files like JPG and BMP on the device.
Configuring settings such as power off, sleep timer, display, and language.
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