Small 100mmx300mm
5wx2
FM, SD+USB flash mp3 player
18560×2
52mm x2 speakers
length of 4ps M4 bolts is 298mm
https://ru.aliexpress.com/item/Wireless-MP3-Player-Decoder-Board-Audio-Module-USB-TF-Radio-For-Car-Red-Digital-LED/32830967358.html?spm=a2g0s.9042311.0.0.tR7rB4
Credits:
Andrew1978