... switch pael(the chair down , up, backward, forward,heater,water supply,saliva,set,reset,LP, operation light )eleven control4. ... system7.Assistant control system down ,up,backward,forward,heater,water suppply,salivaseven control8.Saliva ejector with high and low suction9 ... .3-way syringe(hot water)10water purified system (built-out)11.foot control for handpiece speed12.floor box-for electric,air,water ...