quipped with Four-wheel driven massage mechanism, this can move upward and downward. Automatically scans the massage point of the upper body and shoulder. Programmed with five kinds of massage functions: Shiatsu, kneading, flapping, knocking and synchronous kneading & flapping. Automatic Massage modes for the upper body. (Three optional areas of the upper body; shoulder and neck; back and waist) Offers manual massage for the upper body with three options (overall, fixed and partial area) with five levels of speed respectively. Under the massage modes of flapping, shiatsu and knocking, the width between the two massage hands can be adjusted in three levels (wide, middle and narrow). Two types of air pressure massage function. Strength of the air pressure massage can be adjusted. Two ways of vibration massage function, one on both side of the seat cushion, two strengths available. Armrest air pressure massage. Also equipped with Mp3 music function. Hand held jade heating function. Massage state memory function. Backrest heating function. Lying Angle adjustment function; Calf Rest reclining and declining function; Backrest reclining and declining function. Automatically sitting up function of the chair and automatically recovering function of the backrest mechanism when the machine gets turned off.