1.SAFETY Safety emergency stop control device Safety blockage protection device Dental chair interlock system Emergency chair position Water-electricity -air with one button switch system Water-electricity -air separation structure design 2.HUMANIZATION Micro-computer control liftable instrument tray Only 9 second for backrest to move from lowest point to highest point Clean chair position after work Multifunction foot pedal control system, convenient for doctor¡¯s operation and avoid cross-infection 135¡ãrotatable rack, convenient for patient and doctor¡¯s 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