Dual-core S track neck back robots hands rollers up and down, generate a more effective massage to neck stress and back pain, than 8 points fixed back rollers. One button zero gravity, feel ultimate relaxation when the chair is fully reclined. Full body airbags compression on shoulders, arms, foot and hips, relive whole body pain and tense. Altered remote control with a bigger LCD screen and clearer buttons, easier to use and more accessible. More Effective neck massage: Suitable neck massage position can be chosen to fit your height, 3 levels of adjustable massage intensity to meet various needs. 6 auto programs, lower back heating function, more effective to relieve waist ache. Comes with 2 boxes, updated inner structure details easier to assemble, spend less time in assembly. Other Features：Built in Bluetooth audio player, lower back heating and led light, foot airbags and roller massage.