These are brand new in the original box. I am selling several sets and can offer a discount for 4 or more.
They are a pump system, put the leg cuffs on, and graduate air pressure is pumped through 4 chambers in each leg. This is in essence a massage, helping with circulation, recovery from sport, standing all day, injury, ect. 

They are an amazing device and work great! I love em!
We also have an arm/ shoulder cuff accessory for an additional 50 dollars if interested.  Retail is $650, but I'm selling for $475 shipped