Pro-Form AIR WALKER - PFMC7775 blends advanced engineering with contemporary styling to provide a no-impact, total body workout in the comfort of your own home. It features an electronic monitor that offers five different modes to provide instant exercise feedback: Reps/min - Displays the number of repetitions you are performing per minute, Reps - Displays the total number of repetitions you have completed, Calories - Displays the approximate number of Calories you have burned, Scan All - Displays the reps/min, reps, calories, and time modes, for approximately 5 seconds each, in a repeating cycle, Time - Displays the length of time you have exercised.