Powerful, Up to 240 MPH Blow Speed Allows More Power for Removing Matted Leaves and Blowing Large Piles of Leaves. 385 CFM Air Volume For Maximum Vacuuming and Mulching Metal Mulching Impeller with 16:1 Mulch Ratio Improves Impeller Life and Reduces 16 Bags of Leaves to a Single Bag 2-speed Switch Reduces Air Speed around Flower Beds and Mulched Areas Easy Empty Bag Design Makes Emptying Mulched Leaves Easier, Manufacturer: Black & Decker