This home unit is as close to what the professionals use as possible and yet even safer than most other models! Ultrasound is an excellent way to reduce deep and painful inflammation, joint restriction and swelling. Our Gurin portable Ultrasonic Massager is an ultrasound device that can produce one million vibrations per second. This causes the tissues to compress and expand at the same frequency of ultrasound and this effect is called micro massage. Micro massage, stimulates the tissues and improves the metabolism of cell membrane and leads to the generation of frictional heat.