Can't see the pictures properly as the look badly taken on purpose to draw people in, but my guess would be some sort of cheap android TV box or media streaming tv drive.
But I have to wonder what it was doing under YOUR tv stand in YOUR house and YOU don't know what it is.
It's fairly straight forward, if you want to start it , press start. You can work out the rest of the controls for yourself !
No silicon heaven ? preposterous ! Where would all the calculators go ?