The Precor C776i Stair Stepper has climbing which is a familiar movement appropriate for beginners, but can also challenge even the most fit athlete. The QuickStart feature gets users exercising quickly with no prior instruction. Low-maintenance design Extremely durable, the Precor climber uses a low friction, self-powered generator systems and a belt drive that doesn't collect dust or stretch like a cable drive. Self-powered with a superior feel Without power cords, you can place it anywhere on the floor. The C776i uses the same 6-phase generator as the elliptical line, so the smooth feel and quietness enhance the user experience.