IntelLeg Knee (ILK) is one of the few motorized knee prostheses which can provide active support and active swing. Because of the active support, amputees can stand up with less effort and climb stairs with alternating steps. Because of the active swing, amputees don’t need to kick their stump forward anymore and can have much-improved gait and loading symmetry. The active support and swing preserve the joint and muscles of the sound leg and the back, preventing secondary complications. ILK is very intelligent and very intuitive to use, for both prosthetists and patients. ILK comes with standard warranty packages and is easy to maintain.