Bowflex TC200 TreadClimber Combines the motions of a treadmill, a stepper, and an elliptical for an easy, low-impact workout with high-impact results and all you do is walk Free BowflexTreadClimberApp sets, monitors and tracks personal fitness goals Integrated Bluetoothconnectivity automatically shares your data with MyFitnessPal, Apple Health and Google Fit and stores up to 4 different user's data Burn up to two and half times the calories of a treadmill at the same speed* 5 workout programs  Just Walk, distance, calorie and intervals Heart rate zone light bar tracks heart rate across 4 zones Speed range from .5 to 4.5 mph *Source: University of Wisconsin (TreadClimber, 2011) and Adelphi University Study (Stair Climber, 2004).