stairs. so, the older software, the one i had four years ago, it would take a couple steps to catch up to what you were doing and figuring out. >> you say this is happening all the time. where you're going to be -- what do you want the leg to do next? >> we want the leg to be able to have longer battery life. we want to have even better stability going up and down stairs and up and down hills, and get people just more instant reaction. >> is covered by insurance. >> currently available for veterans through the va and the department of defense hospital and patient with workers compensation insurance but not covered by medicare or commercial payers like blue cross blue shield. >> i can imagine others who want to get their hands on this leg. there is a huge demand for and it what due you do to try to get it to them. >> partest just making the patients aware of it. so we have done a lot of direct to patient marketing to build