TENS 7000 Digital TENS Unit with Accessories - Muscle Stimulator Machine for Back Pain Relief, Sciatica, Neck, Nerve, Shoulder, Hip, Elbow, Muscle Pain ReliefNeed Prescription Strength Pain Relief? A TENS unit muscle stimulator and TENS machine that provides pain relief, acts as a muscle massager or shoulder massager, provides carpal tunnel relief, and acts as a muscle relaxer(great for muscle recovery) Over 3M TENS 7000 Devices Sold. A consumer over the counter favorite back pain relief device and a leader in physical therapy equipment for providing immediate and lasting drug free muscle pain relief from