This was a commercial model Versa Climber that I purchased years ago. Still works for exercise, but needs a new control module according to VC tech support. 5.00. I don't use it and it has been out a couple of years. Just try to keep going on this for about 15 minutes or until exhausted then go another minute or two. I didn't have the need for it to tell me how many steps it took for me to feel like I got run over by a truck.