The Nordic Track Audiostrider 650 Cross Trainer is a great cross trainer. It has 4 Smart programmes and 2 Heart programmes designed by certified personal trainers.. The Resisitance is a Silent Magnetic Resistance SMR TM with 18" ergo stride. The display of the Nordic Track Audiostrider 650 is Blue Backlit High Definition window with 2 7x10 matrix displays. EKG TM Grip Pulse Heart Rate Monitor and Chest Pulse Monitor for a more accurate heart rate reading. speed, times, distance, calories, cards and pulse. Adjustable Autobreeze Workout Fan TM to keeps you fresh whilst training. Odometer, carb readout, audible trainer (1 speaker). It is also compatible with the I Fit Sd Card.