I have never seen anything like this before and I've had quite a few Sony turntables before. Like with all Sony's product they are equipped with their latest and patented technology. The PS-4750 has the SBMC (Sony Bulk Mould Compound) material in it's base (plinth) and platter to help with absorption of vibration. As well, Sony's air filled cushions on the platter and rubber feet to help with vibrations.
It also features a stylus overhang gauge, a nice low friction tone arm and an extra auxiliary weight in case you have a heavier cartridge.
Really, it's an over engineered turntable, which is a nice. However, while it's not one of their TOTL turntables, it's still an incredible turntable. You can also use your own RCA cables in the back in case you want to use something of higher quality, like silver wiring.
It's a direct drive, 2-speed, fully manual turntable and more importantly when paired with this Grado ZT+ or Grado Black, it's a phenomenal turntable that sounds great!
Did I also mention it looks pretty damn cool? It's one of those turntables you have to see and appreciate in person.