For the person who wants something they can move around. This cushion adjusts to the angle on the backrest to a posture that suits you. Two kneading heads travel up and down your back, with two vibration motors on the seat. Microcomputer controlled with automatic timing, speed adjustment and intensity. This lightweight and portable cushion is suitable for use in the home or the car as it also comes with a cigerette lighter plug. CLICK ON IMAGE TO ENLARGE.