I was able to power this on and load some slides.  I was able to adjust the focus like it should.  The square / rectangle adjustment works.  The image on the screen is slightly skewed to the left.  I put in a cassette tape and tried playing it but i couldn't hear anything. The carousel did start automatically advancing when i played the tape and would move to the next slide at an interval of about 10 seconds.  When i turned up the volume of the tape there is a high pitched sound coming out.  the bottom of screw of the front has been removed but it is included.  A repair receipt is included where the mirrors were replaced.  Included is a remote and microphone but I did not test those.  Also included is the manual and leatherette case.  The two feet on the bottom extend and retract.  This is a vintage piece and is being sold as is for parts or repair.