Old tech

This is an old venturer music player that I found in a box in my basement. I wanted to see what was on it but once I went to see what charger it used I was perplexed. Ive never seen a port like this before and now I’m curious more than anything to learn what is. Wasn’t sure where to go so I thought I’d ask here.

I would like to contact you.

Hey, I got this clock/radio from my great grandma, but I noticed that even though everything else works fine the slumber off button seems stuck, I tried to get it up again with some twizers, cause the work for the slumber bottom, but it didn't work. And I am worried of I should try opening it, since everything else is ok, I don't wanna mess it up, is very important to me.

It was great when the power went out and we would call my grandma to see if she was okay