... operation light )eleven control4.operation light(high/low intensity control)5.Luxurious90° Tempered ceramic spittoon6.Auto spittoon flush and ... cup filler control system7.Assistant control system down ,up,backward,forward,heater,water suppply ... (hot water)10water purified system (built-out)11.foot control for handpiece speed12.floor box-for electric,air,water ...