The BIOS Living Compression pump is battery powered and will run up to 12 hours continuously. It is worn on the back of the leg, approximately 5.0cm (2in.)below the knee. A unique wave motion continually propels blood upwards, increasing lower leg circulation by 88%. The result is a substantial reduction in pain and swelling, especially in the lower legs and feet. It has significant advantages ov er compression stockings because it is easy to strap onto the leg without assistance. It can be worn comfortably for hours. It is a medically effective alternative to wearing compression stockings, particularly for patients that have severe swelling and are unable to put on compression socks.