Features: 1, With S-shape back rail. 2, Four roller in the back position can work up and down. 3, On back position have kneading, tapping, hitting and combined massage function. 4, 24 airbags inside can give human very soft, comfortable massage. 5, VFD screen control. 6, Active flip cover design and intelligent sound & light navigationsystem make the operation easy and convenient. 7, The calf position can be stretched. 8, New design make the armrest also can enjoy air massage.