An assembly of battery-powered devices used to apply various modes of electrical stimulation transcutaneously to treat/prevent neuromuscular symptoms and disorders typically as a form of physical therapy. It typically includes an electric current pulse generator, electrodes/probes, audible and/or visual indicators, and software. It may provide biofeedback and/or transcutaneous electrical nerve stimulation (TENS) to treat pain. It is typically used to prevent muscle atrophy, for muscle re-education, to relax muscle spasms, to improve blood circulation, for postsurgical stimulation of calf muscles to prevent venous thrombosis, and/or to maintain or increase range of motion.