... )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, ... foot control for handpiece speed12.floor box-for electric,air,water and drain connection13.24V noiseless DC motor chair14.dental chair15.heater16.multi-foot ...