Controlling Call of Duty or flying a drone isn't all the Myo armband can do. Researchers at Johns Hopkins University are employing the muscle-sensing wearable for a different application: prosthetics. With two of the gadgets, a patient is able control a prosthetic arm when he thinks about it. The pair of Myo bands on the upper arm read the electric impulses from muscle movement and wirelessly transmit them to a nearby computer. That computer determines what movement he is trying to make and tells the prosthetic arm to complete the task.