Standard Configurations:1, Electrical rinsing water supply: 1set, 2, Electrical flush water supply: 1set, 3, External water & air purification: 1set, 4, Mute motor controlled chair: 1set, 5, Rotative tempered glass cuspidor: 1set, 6, Low saliva suction: 1pc, 7, Adjustable operation light: 1set,...