JR-988-9 Office ChairFeatures1.3D Kneading Massage for Neck.Back→Neck with 4 balls .Back with 16 balls.2.Vibration for Buttocks and Leg→High Frequency.Independent Switch.3.Heating for back→Therapy the full body,Accelerate blood circulation.4.Chair back can be adjustable for 90°-160°.5.Simple remote to convinent operation. Specification 1.N.W:20kg 2.G.W:25kg3.Body Size:90*70*100cm 4.Packing Size:88*65*53.5cm 5.Qty.Per Ctn:1 Piece / 1Carton 6.20',40'H Qty:72,190 pieces7.Rated Voltage: AC 100~240V,50~60HZ 8.Rated Power:50W9.User of Weight:0~120kg 10.Color:Black,Customizable 11.Certificates:CE,ROHS,FCC