This portable leg massager is the easy, convenient way to stimulate circulation and massage away tension and pain. Just wrap it around your leg, sit back and relax as gentle inflation and deflation cycles work their magic. Try the relaxing 15 minute massage program, or choose an automatic mode with low, medium or high compression settings. The smart air pressure sensor will not over inflate, ensuring continued comfort. Battery operated so you can use it in the office, car or even a plane. Adjusts to fit calves up to 20" in diameter.