Zynex, Inc., operating through its subsidiaries, specializes in the development, production, and sale of medical devices. These devices primarily utilize electrical stimulation to alleviate both chronic and acute pain, and to stimulate and exercise muscles for rehabilitation. The company's core product offerings include NexWave, a versatile, dual-channel device combining interferential current, transcutaneous electrical nerve stimulation (TENS), and neuromuscular electrical stimulation (NMES), which is actively marketed to physicians and therapists by its field sales force.