Using composite material for maximum durability. Auto rolling forward and backward. Uniform three-dimensional kneading doesn’t need to adjust. High-grade PU leather and breathable mesh fabric. Built-in over-heating prevention mechanism. Beat the shawl strong message, a variety of modes of adjustable, alleviate pain, eliminate fatigue. Heating physical therapy, applicable to the neck, waist, back, legs and other parts of the health care and physiotherapy. Used for car and home with configuring car charger.