ECHO 211 MPH 1071 CFM 79.9 cc 2 Stroke Gas Engine Backpack Blower with Tube Mounted Throttle79. 9 cc 2 stroke professional grade engine Carbon fiber frame and fan case contribute to the lighter weight Heavy duty backpack straps for all day comfort Patented wear ring reduces tube wear Tool less access to large top mounted filter 2 year commercial 5 year consumer warranty California residents see Prop 65 WARNINGS Features Item Weight 24. 8 Engine Type 2 Cycle Noise rating (dB) 79 Blower Type Backpack Blower Maximum Air Volume (CFM) 1071 CA