OVERVIEW: Rainbow E2 Black 2 Speed Vacuum Cleaner with 10pc Prolux Storm Shampooer Bundle The E2 Black model is the best deep cleaning Rainbow that has ever been made with highly efficient Water Filtration Technology and also added HEPA filtration. The E2 Black is one of the most powerful bagless canister vacuums on the market with an amazing 89 CFM of power! The E2 Black is the 2nd newest model of Rainbow, and as with the other 2 speed models you can use the low speed as an air purifier (very...