DR-HO’S Triple Action Back Belt is a wearable back support with a built in nerve and muscle stimulator that not only supports your back, but also helps to relieve your back pain and sciatica pain using our patented AMP Pain Relief technology. What sets this back support apart is the patented AMP technology - a groundbreaking combination of four pain therapy technologies: TENS, EMS, NMES and Auto-Modulation. These technologies work to relax muscle spasms, increase local circulation and help relieve your muscle pain, arthritis pain and sciatica pain.