Concept2 Model E Indoor Rowing Machine Indoor rowing machine with sliding seat for complete total body workouts. Flywheel design minimizes noise while maximizing a smooth feel. 20 inch frame height, positioning you at a comfortable seat height. Separates easily into two parts for transport and storage. Caster wheels make it mobile. PM4 Performance Monitor accurately measures performance and heart rate, includes chest belt HR transmitter. Requires footprint of 9 x 4 feet; 500-pound capacity; 5-year frame warranty.