*Designed with a four-wheel driven muted massage mechanism which can move up and down in the backrest. *Programmed with five emulational massage function of shiatsu, kneading, flapping, knocking, kneading and patting. *Designed with two control modes for the upper body: automatic one and manual one. *Under the manual state, there are three options of the overall, fixed and partial area. The massage hands can move up and down with five levels of speed under the fixed state. There are three width options for the massage hands under the state of shiatsu, patting and knocking. *The calf rest can be power-lifted and reclined separately or together with the backrest. *Five degrees of the shoulder height adjustment and can be recorded. *Restoring the massage hands after turning off the machine.