Dual foot and calf chambers with high intensity rollers and vibration knead your feet while surrounding your calves to help relieve tension after standing or walking. The 23.5 x 13 x 9.5 in unit fits up to US men’s size 10 and women’s size 12 with space for a 15-in calf circumference, so it can accommodate a range of users. Four automatic modes plus a manual setting let you adjust speed and direction for a customized massage. A remote control allows simple operation while seated, and removable zippered sleeves make cleaning easier.