Pioneer SK-300 Boombox 1980’s 1982 silver face tape retail cassette

Product Name: Pioneer SK-300 Boombox 1980’s 1982 silver face tape retail cassette
Pioneer SK-300 The ReC/ Mute button does not stay pressed in but I think it's supposed to be retail like that. Radio works both AM/FM Unit powers up with power cord. Battery Compartment looks like it h had some old batteries in there before. There was a little white stuff in there and you can actually hear it moving around in there when you shake it, so not sure if it works via batteries. You may have to open up the unit to remove all the stuff in there. The tape player does play and the speakers work. The tape seems to play a little bit slow where you can barely tell it's a bit slower but it may just be my old cassette tape. It's the only one I have. The tape buttons all press in and pop out correctly , but the forward and reverse seems to be bad. It looks like it wants to work but gets stuck. I think it moves on one direction for a bit though, but it may need new belts or something.