it has two speed pots I think it is vibrations and speed.
The woman kneels over it and her clit is touching the base of the unit that inters the womans vagina about 4 inches but the intence pleasure cums (pun in tended) from the external stymuli of the clitoris. The vids that I have seen were whorific (pun intended) intence far beyond any thing that I have seen.

By the way the Cubs are winning Yea go cubs
Ps I just looked at there web site $1353 US oh my god
little much Oh they offer a 5 year warrenty and it is returnible minus a $125 dollars reconditioning fee.
and they offer a lay (pun intended) away plan