This is the massager that is worn like a backpack to provide invigorating massage and therapeutic heat to areas that are prone to tightness. Unlike common massage pads that can only be used while seated, or wands that must be held uncomfortably in place, this massager straps over the shoulders to secure snugly against the back whether you are seated, standing, or lying down. The massager’s four vibrating heads penetrate deep into muscles to relieve stiffness, stimulate blood circulation, and soothe aching backs and shoulders. A tethered controller allows users to select from four massage programs, two intensity levels, and optional heat. The cushioned massager is soft against the body and its padded shoulder straps adjust to fit most sizes. Automatic shut-off after 15 minutes. Plugs into AC with 6' cord. 14" H x 19" W x 1/2" D. (1 lb.)