Wagan Shiatsu Lumbar Massaging Cushion Superior true massage performance - state of the art mechanism provides an unparalleled feel that is like the hands of a massage therapist Deep kneading shiatsu massage - relieves the tightest knots Ergonomically designed for lower back support and promotes better posture Fits most cars and chairs - adjustable strap secures the cushion to the back of your chair Includes AC and DC adapters so you can use it anywhere you go