Shua Commercial Stair Climber (7 Year Warranty)SH S8901 Stair Climber Elevate your cardio workouts with the SH S8901 Stair Climber a commercial grade fitness machine built for performance, safety, and user comfort. Featuring 40 resistance levels and 15 pre set workout programs, this stair climber adapts to any fitness goal, from fat burning to endurance training. Key Features: Versatile Resistance: 40 levels of resistance allow users of all fitness levels to progress and challenge themselves.