Here I Have a Pre-Owned and In Working Order VINTAGE 1987 QUICK SHOT STUDIO 4 QS-2050 SOUND MIXING SYSTEM.  Seems like the cassette plays slow and the knobs may need some electrical cleaner as I hear static on them. I have a video if Interested. No batteries included. Also no way to hook up mic to the stand?? Sound effects work good. See All Photos for Details, be sure to use the ZOOM function for best results.  Super Fast Shipping.