It is the little 10 lb model. I was skeptical that it would work as well as the full sized, but it does! Oh, and it is soooooooooo much easier to carry up the stairs. As if that wasn't good enough -- all my attachments from my other Dyson fit it, including the coveted power brush! It is also one of the new "ball" models that actually can turn. It is the most fabulous cleaning machine ever invented!