With unrivaled function and durability, the Concept2 Model E Indoor Rower is the machine of choice for people and athletes of all ages and ability. While similar to Concept2’s Model D rower, the Model E sits up higher above the floor (20 inches, about the height of a typical dining room chair), which is optimal for those with balance or mobility issues. The Model E also comes with the PM4 Performance Monitor, and the monitor arm is fixed in place on the Model E (where it pivots on the Model D). The PM4 also includes a rechargeable battery pack and Suunto chest belt for heart rate monitoring. » Read more: Concept2 Model E Indoor Rowing Machine