Free Shipping - Best Massage Chair has all features and functions. Intelligent roller system - Flexible, conforms to the contour and shape of your back. Rolling: Moving up and down, like the fixed-point of revolving finger pressing for direct and effective massage effect. Kneading: Reduces muscle pain and works out knots. Shiatsu Results: Power rollers are used to relax muscle stress, reducing fatigue and rejuvenating the mind and body. Compression and Percussion: Improves flexibility. mobility and posture of the legs.