OVERVIEW: The E2 2 speed is the second model of Rainbow with the newer 2 speed motor style which allows you to use the low speed as an air purifier (very quiet) and the high speed to vacuum. This is one of the best deep cleaning Rainbow vacuums that has ever been made with it's highly efficient water filtration technology and added HEPA filtration it not only keeps your floors clean, but will also clean your air at the same time.