Sansui. Now there's a blast from the past!!!
Used to be one of the very best Japanese hifi manufacturers, up there with Denon and Pioneer. But I haven't heard much of them in recent years, and I think a lot of their budget stuff is simply cheaper manufacturers' products with a Sansui badge. I would hazard a guess that this personal stereo is just such an item.
In my experience all the VCD/MP3/CD players I've used have clearly had the same underlying circuitry. Poor sound quality, with interference from what sounds like the timing chips when playing discs. The video isn't too bad though. A lot of the players I've used have also had awful build quality, with buttons that don't work a lot of the time, bits of plastic which snap off and so on.
Make ABSOLUTELY CERTAIN this is a genuine Sansui (phone them and ask who manufactured the unit). If it isn't, run a mile, I'm afraid. That's my opinion anyway!