Bowflex TC100 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 Just walk and Burn up to two and half times the calories of a treadmill at the same speed* 4 Electronic Functions: Speed, Distance, Time and Calories Speed range of .5 - 4 mph Heart-Rate Monitor with integrated contact grips Interactive backlit LCD display Built-in USB charging port Water bottle & Media Shelf/Tablet Holder Compact design that fits easily in the home *Source: University of Wisconsin (Tread Climber, 2011) and Adelphi University Study (Stair Climber, 2004).