Uses the same firmware as all other cheap MP3 players. Still has a limit of 4000 files because of the Ruizu player it replaces. But I really didn't expect more. For what I use it for it does the job (music while working out) and if it lasts a few years the cheap price is worth it.
M-Player IPod Nano 3Rd Generation (8GB Portable Audio & Video
44 Review
SanDisk 16GB Clip Sport Plus MP3 Player Red - Bluetooth, LCD Screen, FM Radio - SDMX28-016G-G46R: The Ultimate Music Companion
27 Review
MP3 player DIGMA B4 8 GB, black
29 Review
MP3 Player DIGMA U3 4 GB, black
40 Review
Experience Nostalgic Music With KEiiD CD Player Retro Home Boombox: Get The Used-Like New Version For Just $99
17 Review
Experience Ultimate Music Enjoyment with Sony CD Boombox ZSPS50B.CED - USB Playback & Audio Input Included!
13 Review
π΅ Oakcastle BX200 Boombox, Portable CD Player and FM Radio with Bluetooth Stereo Speakers and Multi-Connection Capability
9 Review
KEiiD Wooden Retro CD Player With Bluetooth, FM Radio, USB AUX Inputs, Speakers And Adjustable Bass/Treble For Home Stereo System And Boombox
27 Review