We not only removed the waist belt – so the user controls the speed from the display – but we left it self-powered. It also is impossible to cheat. It’s unique closed loop control keeps the speed level even when you are tired and leaning on the handle. It is a revolutionary stair climber not only in speed control but it maintains the size of Stairway making it available to fit where other stair climbers won’t. Stairway GTL is easy, simple and smart!