16 resistance levels provide a wide training range from aerobic fat burning to body shaping. 1-4 levels are for early assistance, 5-8 for mid-term functional training, and 9-12 for late rehabilitation. A large display shows workout time, speed, distance and calories to help you reach your fitness goals. Safe knee protection: the elliptical movement trajectory relieves joint impact and protects knee soft tissue, helping safeguard the health of your family and making the exercise safe for the knees. Dual function magnetic elliptical machine: supports both seated and standing postures, with forward or reverse motion. Seated exercise helps you relax and maintain leg vitality, while standing exercise effectively stimulates your hip and leg muscles. Silent operation: low noise design keeps this elliptical cross trainer running quietly and smoothly, so you can exercise without disturbing others and you can work out late at night. It is easy to carry and move to your study or bedroom.