The Shark Stratos is a cordless vacuum cleaner that senses the dirt you can't see and automatically boosts power. It also comes with a odor neutralizer dial that you insert into the nozzle. It also has a multi-flex wand that can bend to reach under furniture and the wand can also flex down to store the vacuum. It has 2 brushrolls under the bottom. And get this- the vacuum can be used to dust when you're using the handheld vacuum with tthe dusting brush.. It has 3 suction levels that you can switch between when you're vacuuming. However, what I don't like about this vacuum is that it drags when I'm vacuuming the carpet. It glides easy on hardwood and tile, but not the carpet. When I use the boost mode, the lines in the carpet are very noticeable, which that doesn't bother me. I just wish it didn't drag when I'm pulling the vacuum back towards me when I'm vacuuming. I believe it's because of the 2 brush rolls situated at the bottom.