Back Pain Relief System Tens plus Support Belt. Electronic Massage System for Low Back Pain. Intended for the temporary relief of low back pain associated with sore and aching muscles due to strain from exercise or normal household work activities. Tens Technology – Transcutaneous Electrical Nerve Stimulation, Dual Channel Digital Stimulator with One Size Fits Most Support Belt. FDA Cleared for OTC sales, Now available without a prescription. Easy to use controls with 8 massage modes. Three timer modes. Clinically proven Rapid Relief for low back pain.