Shitty website they had. I still couldn't figure out what it was. But if it is a "jet" that propels waters out at a fast speed so you can swim in one place, at my condo in Honolulu we had a huge black bottom pool with 6 of these built-in. They worked pretty good but I used them mostly to massage my back shoulders and chest after working out. They are much more powerful than regular Jacuzzi jets.