chair function：the mechanism hand move up&down,equiped with 3 function,kneading,shiatsu,knocking.Also you can choose the synchronous kneading and knocking.you can choose any one to combine.the seat and the backrest can adjust by the controller,the armrest can lift 90 degrees.arms with tray.Fuction of the tub:steel colorful glass basin，without pipe，at the bottom it has sole surfing.and the lamp have 7 seven color,and change one by one.Also the foot cushion can lift up and down.there are 2 buttom of the hot&cold water.the back of the tub has a water inlet&out pipe.