You get two complete controllers built into one slick unit. Each side has an arcade style joystick, eight buttons in a ?fighter? layout, and a button for setting turbos, one for clearing turbos, and a ?slow? feature. There are also two sets of Start and Select buttons located in the center of the unit. The Twin Shock Home Arcade unit is intended for use with the Home Arcade System, although four of the six rubber feet are on the outer edges of the bottom, too far to hold it fastened to the H.A.S. I did find that relocating the two rubber feet closest to the front on either side inwards far enough to rest on the H.A.S. controller surface provided ample traction with little fuss. (However, for ?tournament sessions,? I break out a pair of short bungee cords and strap that sucker in place!) This is an excellent controller for fans of old school fighters.