This Precor EFX833 elliptical unit is what is used in commercial fitness facilities across the world. The Precor EFX833 is energy efficient and no power supply is required. It has an adjustable CrossRamp that angles from 13 to 40 degrees, 15 preset workouts, 20 resistance levels and touch and telemetry heart rate monitoring with Smart Rate. The preset workouts and resistance levels help you tailor your workout to your fitness goals and stay challenged. The variety in your work outs that comes from using the EFX833 helps avoid plateauing. The Elliptical Fitness Crosstrainer provides smooth, natural, low-impact workouts that help you get results in the convenience of your home