1. SAFETY Safety emergency stop control device Dental chair interlock system Emergency chair position Water-electricity -air with one button switch system Water-electricity -air separation structure design 2. HUMANIZATION Only 9 second for backrest to move from lowest point to highest point Multifunction foot pedal control system, convenient for doctors operation and avoid cross-infection rotatable rack, convenient for patient and doctors operation Air vacuum system with muffling device 3. HYGIENE Filter device of high and low suction saliva ejector can be removed, convenient for clean and sterilized Fully ceramic spittoon, anticorrosion and easy to clean 4. QUALITY Low noise motor from Taiwan Germany Bayer silicone handpiece tubing America DuPont membrane Hydrolysis resistance and ageing resistance PU pipes High stability chair frame