Relax and soothe your overworked neck and shoulder muscles at the push of a button. Suitable for shoulders lower back and legs. Rotates clockwise and counterclockwise to emulate the hand movements of a real kneading shiatsu massage. Heat option promotes relaxation and melts away stress. Warm and release muscle tightness by radiating heat into the muscles. Elastic strap on back attaches to the back of a car seat.