Clinically proven to provide DVDT prophylaxis, reduce post operative trauma, pain and swelling in the lower and upper limbs while enhancing arterial blood flow. Utilizing a powerful pump formed by the venous plantar plexus in the sole of the foot, the foot pump imitates the natural sequence of physical venous flow.- A-V Impulse System Dual Channel Controller (Continental US Only) (Item on Manufacturer Backorder - Inventory Limited when Available)