about 8 years old. Bought as Nautilus T618. Now a NordickTrack product. Works Great. Heavy Duty 250 pound unit. Inclines and moves like the wind. Come get it this weekend. Took the handles off so it will fit in an SUV, but you will need 3-4 strong people to get the tread part down one flight of stairs and out to your SUV/truck. Older version of this unit: https://www.garagegymreviews.com/nautilus-t618-treadmill-review