Technicly a 4-Speed.
To my knowing, All Kirbies from the Dual-Sanironic 50 (DS-50, Dual-Speed 50) to present are 2 speed models, as they kick into a higher gear of motor speed to increase hose suction. With the Ultimate G having a "Delicate" Setting, It would technically make itself a 4-Speed Kirby, Hose, Hose Delicate, Floor, & Floor Delicate.
Cool, Isn't it?
-Alex.