Jim:
Forgot about this (owned one in the early 80’s to take to the beach).
It has a stereo mini plug input on the side that a walkman type CD could be used with and an earphone jack on the top of the radio unit.
The pop out radio and the base are both individually battery powered or the whole unit can be powered by a wall wart.
Lightweight (nice design) and good for moderate SPL’s.
Sounded better (over radio) with LP/Cassette input through the mini aux in and I also used it with a Casio "memory" keyboard that I used to compose music.
I gave it to a pro musician/composer friend to use with his keyboard in a small apartment.
They come up often on Ebay.
https://walkmancentral.com/products/srf-80w
DeKay