The Therapeutic IT-7800 Massage Chair Techniques Admin Mar 13, 2015 share Facebook Twitter Google + LinkedIn Pinterest Email Share... Check out our video for a breakdown of the 4 massage techniques, kneading, knocking, dual and tapping, found in the Infinity IT-7800. Here are what customers are saying about their chair: "Unbelievable!!!!! Everyone that cones over loves it. The chair has helped me tremendously with my everyday constant back pain" -Sandra "Can't live without it!"- Lauren "This is the ONLY product I have found that truly relives the stress and tension in my shoulders. I absolutely LOVE it. Great buying experience."-Kathy