The Gurin portable Ultrasonic Massager is a device that can produce one million vibrations per second which causes your tissues to compress and expand at the same frequency of ultrasound. Micro massage stimulates the tissues, improves the metabolism of cell membrane, and helps circulation and muscle relaxation while promoting healthy care for deep tissue. This massager generates deep heat within body tissues for treatment of selected medical conditions, such as pain relief, muscle spasms and joint contractures.