ECHO PB‑770H – X Series 63.3cc Backpack Blower | 756 CFM & 234 MPHThe ECHO PB770H is a powerful, professionalgrade backpack blower designed for heavyduty cleanup. With a highoutput engine, exceptional air volume, and ergonomic comfort features, it helps you move large amounts of debris quickly and efficiently. Its hipmounted throttle and vented back pad make it ideal for long workdays in demanding environments. Key Features 63. 3cc professionalgrade 2stroke engine delivers reliable, highperformance output 756 CFM