... fuction:cervix,back,haunch massage, 2option:Ozone,techinician chair,cover of massage tray hot tub,Model foot spa chair A-8058BQuality ... ,strength,manner adjust3.adjust the move in front and back of seat ,backrest can up and down move ,the two handrail ... automatically4.cup board5.numerical control switch6.1Hp water pump7.the liquid type of waterfall8.the square watefall water in9.the luxury switch ...