High quality, lightly used walking treadmill for use under your standing desk. It has a high power motor and only goes up to 4mph (just for walking), but can run for up to 6 hours each day for walking while you work. I loved this treadmill and it works perfectly, I just don't work from home anymore and can't use it at my office. I bought it about 8 years ago for $1100. Here's an article with an overview of the model (the one pictured is a newer version): https://www.treadmillreviewguru.com/lifespan-tr12000-dt3-under-desk-treadmill/