Neck position- a pair of special, superhigh, stretchy, clockwise and anticlockwise and kneading massage balls. Back and waist positions-three kinds of massage ways with twelve concave and convex massage balls.Kneading mechanism controlled by microcomputer. Thigh position-four kneading massage balls. Calf position-a group of nipping, kneading, rolling and pressing devices. And up and down function controlled by hand Backrest position-up and down function controlled by hand.