Once they receive a socket, they will complete 1-3 days of training to learn how to control the prosthesis with either conventional or pattern recognition control. The prosthetic training days may occur concurrently with the fitting appointment or it may require a separate visit. The subject will return home for the initial 8 week home use trial. They will be asked to use the prosthesis for an average of 2 hours per day across the 8 week home trial period. They will keep a home log of prosthesis use and check in weekly with a therapist to discuss usage and prosthesis performance. They may also be provided with a laptop computer with a camera for Skyping. The laptop can be connected to the prosthesis, and the screen can be viewed remotely. The research team can then continue with remote follow up with more training and problem solving as needed. Directly following the 8 week home trial period, usage data from the prosthesis will be downloaded. The subject will complete 1-3 days of outcomes testing with a therapist. A series of tests will be performed and data recorded of your performance. The subject will then repeat the 1-3 days of training, 8 week home trial period, and 1-3 days of outcomes testing with either the other type of control (i.e. conventional or pattern recognition).