LITTLETON, Colo.--(BUSINESS WIRE)--Zynex, Inc. (OTCBB:ZYXI), a provider of pain management systems and electrotherapy products for medical patients with functional disability, announces it has signed a lease to rent a 75,000-square-foot building in Lone Tree (Littleton), Colorado. Zynex currently leases 16,553 square feet in Littleton, Colorado and the new building will house its headquarters, office, plant and warehouse.