The Omron E3 Intense is a portable drug-free pain reliever for back, shoulders, joints and muscles. Based on TENS technology it is a triple action device which â?? (1) Blocks the pain messages (2) Stimulate the release of endorphins (natural pain killers) (3) Improves the blood circulation (as result of repeated muscle contraction and muscle relaxation) Subject to quantities , all prices are negotiable.