Zynex Inc is engaged in the manufacturing and marketing of medical devices. It operates through one primary business segment, Electrotherapy and Pain Management Products. The business activities of the company are carried out through its subsidiaries. The company designs, manufactures, and markets medical devices that treat chronic and acute pain, as well as activate and exercise muscles for rehabilitative purposes with electrical stimulation. The company markets Zynex-manufactured products which include NexWave, NeuroMove, InWave E-Wave, and others.