gotta figure out how to make it work but..... its really cool,, got two of them if somebody wants one.
I had one of those when I had my first car (78 Trans Am). They plug into an 8-track stereo, kinda like a prehistoric version of a cassette adapter for portable CD players (or iPods). Sounded like , but was still better than the AM-only 8-track radio that the car had. Of course, being the 17 year old kid that I was, I yanked that old stock stereo out, cut the dash, and installed an Alpine pull-out cassette deck...
Pretty cool that you found what looks to be a new-old-stock 70's retro item...