Chair function: 1.4 kneading wheel on the neck,and 4 kneading wheel on the waist. 2.4 vibration on the seat. 3.The seat and the backrest can adjust by the controller(Electrically adjustable/Manual adjustble) 4.The armrest can lift 90 degrees. 5.Arms with tray. Fuction of the tub: 1.pipeless shower in the bottom it has sole surfing. 2.Foot cushion can lift up and down. 3.2 buttoms of the hot&cold water. 3.The back of the tub has a water inlet&out pipe.