NEED PRESCRIPTION STRENGTH PAIN RELIEF? A TENS unit muscle stimulator and electric massager 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 1M 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 back pain, neck pain, tennis elbow, and bursitis A LEADER SINCE 2008: A 10+ year favorite TENS device among medical professionals for delivering drug-free back pain relief as well as treating common ailments like neck pain, carpal tunnel relief, arthritis, shoulder, knee, elbow, leg and foot pain