The Certus delivers three-dimensional massage along the entire length of your spine and all the way down to your thighs. Enjoy auto programs that are focused on helping you achieve a new relaxed state of being. Let the tension in your feet and legs melt away as the unique outer orbital massage soothes tired calves and overworked feet. Let the dynamic stretch position your body for a lengthening of your back and muscles, giving you renewed energy and life. Take a moment and allow yourself to be fully immersed in the enveloping melody of your favorite music through the built-in Altec Lansing Premium Sound System.