Premium Zero Gravity massage chair equipped with a set of Intelligent 3D mechanical massage hand that can move up and down, front and rear. Automatically detect the position of the shoulder and human body curves and posture. SL-Track long rail mechanism 23 Automatic massage programs Three program memory 6 kinds of massage techniques: Kneading, Tapping, Shiatsu, Knocking,3D Massage and Kneading & tapping Back heating function use carbon fiber as an infrared heating source Built-in 3D digital speakers on the left and right sides Bluetooth function: Smart device can be used to play music on a wireless connection Waist twist and Backstretch massage functions Negative oxygen ions clear dust particles surrounded by the users The footrest is equipped with sensors for automatic adjustment of different leg lengths Calf Squeeze function improves blood circulation, relaxation of muscles and instant relief from pains 7-Inch LED Touch Screen Remote USB Charging function on the Armrest