Fitness Reality E5500XL Magnetic Elliptical Trainer 24 levels of smooth Magnetic Tension resistance. 21 Computer pre-set Workout Programs 3 Computer goal workout settings: distance, time and calories burned Backlit LCD Computer displays distance, time, RPM, calories burned, speed, pulse, odometer and Watts A Double Transmission system results in increased momentum and a smoother striding motion An 18 inch smooth elliptical stride length provides a comfortable and full range work out without any strain on the knees or ankles