I have been very dissatisfied with this style of MP3 player.
Particularly, the "random" shuffle playback feature is either
absent (was, on one that looked similar to this shown) or
a non-random (or always pseudo-randomized in the exact
same order) sequence. One "MP4" that had the LCD video
would always short-loop through the same couple of songs
on skip-forward despite having several hundred loaded.
I much prefer the thumb-drive MP3 players and use one
through a generic 1/8"-plug RF modulator on my older car
with cassette deck. Both pieces are inexpensive on eBay.
The only downside is an extra length of wire, and one
AAA battery a week.
The ignition noise is minor and acceptable since the motor
is not exactly quiet.