1, Adjustable seat height: 240-640mm; 2, Backrest angle of inclination: 100N180 0 ; 3, Max affordable weight: 250kg; 4, Chargeable battery LED operation light, 300mAh: 4.1 Adjustable light intensity, two stage, weak and strong; 4.2 Longer service life, weak light, can be 18hours; strong light, can be 9hours; 5, Wider and longer seat and back rest; 6, With instrument tray; 7, With simple cuspidor; 8, Packing with carton: 8.1 Packing Dimension: 102x55x28(cm) 8.2 Net weight z27kg. Packing List: Iset Back rest and components of chair frame; 1 pc Leg cushion 1 pc Plugging wire for power Iset LED Operation Light Iset Apparatus plate and movable support Iset Simple cuspidor and supporter 1 pc English Operation Manual