ECHO PB-7910H 240 MPH 835 CFM 79.9cc Gas 2-Stroke X Series Backpack Leaf Blower with Hip-Mounted ThrottleThe ECHO X Series PB-7910H expands ECHOs lineup of commercial-grade high-performance backpack blowers by providing higher power at a lower price point than competitive models this backpack blower features a 79.9cc 2-stroke engine that delivers 835 CFM air volume with air speeds reaching up to 240 MPH and 40N of blow force the PB-7910H has competitive blowing performance that reduces the time required to clear large areas and ensures a thorough clean up.