MUZXQII D19 64GB MP3 Player - Manufactured by RUIZU - 18 Soothing Sounds, White Noise Machine + More

64GB MP3 Player with Bluetooth 5.3-18 Soothing Sounds, White Noise Machine for Sleep Baby Kids, Portable Music Player with Speaker, FM Radio, Voice Recorder, E-Book, Support 128GB TF Card. www.amazon.com/gp/product/B0C...
Buyer can lock/unlock the screen by long press the menu button on the upper right corner of the button panel.The reason they design it as this is to to prevent accidental touches during playback.
They have updated the firmware of the mp3. When a Micro SD card is inserted into the mp3, buyer can copy files in the micro SD card into the mp3. It also allow buyer to copy files of mp3 into the micro SD card.
In this way, if the mp3 can't be recognized by computer, buyers still can use the mp3 to transfer music files. If buyers need the new firmware, please contact us at [e-mail]