LifeCORE Fitness R90 Rowing Machine, Black Frame Performance monitor with race program to "race" against computer Air and magnetic resistance - the first level is all Air resistance and then the magnetic resistance is engaged at level 2 and beyond Storage and mobility - the R90 features a quick release frame lock mechanism, so you can easily fold the rower for storage. Built-in roller wheels that allow you to roll the machine into position Adjustable footrests and ergonomic handle - you can strap your feet in with the quick release, industrial grade Nylon straps. (Footrests accommodate a wide range of shoe sizes.) ergonomic handle features a 10-degree bend Durable construction - tough and built to last, our machines withstand any type of workout, used by athletes, military, cross-fit, hotels, etc