This massage chair has the latest zero gravity system, which has 3 levels of angles for weightlessness position to relieve the spine pressure. A built-in audio speaker connects your phone through Wireless and brings music to the massage. And it also has an SL track to perfectly fit your body curve. The upgraded dual electric linear actuators can realize independent leg and back position adjustment. A sophisticated auto-body scanner is equipped to build the massage chair into your body shape and height. And to show its functional diversity, the massage sofa has 12 automatic massage programs, 6 massage techniques, 32 airbags, back heater and foot rollers. There are 4 massage areas, 6 adjustable speeds, 3 adjustable widths and 3 air pressure intensities to choose from. And yoga stretching function can relax the muscles of the whole body.