The SNES Super Advantage is an arcade stick similar to the NES Advantage.
It was made by Asciiware. It was made to simulate an arcade joystick.
The Super Advantage has a slow button, an eight direction joystick, the turbo sliders, and speed sliders. Unlike the NES Advantage, the Super Advantage uses sliders instead of knobs, and also has new speed sliders, to speed up the turbo sliders.