The Rheo Knee XC is a microprocessor-controlled prosthetic knee joint that automatically adjusts its behaviour to activities such as climbing stairs, jogging or cycling. Using Bluetooth, the integrated software transfers data to the accompanying Össur Logic app for iOS devices. Among other functions, the app features a specially designed training program that provides the user with real-time feedback on their gait. Thanks to smart engineering, the casing is water- and weatherproof.