Exerpeutic Model 4010. THIS IS NOT A POWERED TREADMILL. It is driven by walking on it. In other words, by you.
It is in excellent condition. Essentially as new, probably less than 1/2 hour of use. We bought this and found that even on the lowest resistance it was too much effort for 80+ year olds. This young lady seems to be able to do quite well. https://www.youtube.com/watch?v=_SrsL8kZ2_4
It is a very well made unit with several nice features. There is a magnetic control to change the level of effort and three slope positions also affect how much effort it requires.
A console can be used to display Time spent on this session, Speed, Distance for this session, Calories burned, an Odometer (total distance in use since the AA batteries were installed), and Pulse. Pulse is obtained by resting your palms on sensors built into the support handles. The display can be set to the item you are most interested in watching or set to scan through them about 6 seconds on each item.
The unit can be folded upright for storage between usage if space is a consideration. There are several storage positions which are easy and quick to do.