The M18 FUEL? Dual Battery Backpack Blower is designed for the professional, delivering a higher blowing force than a 60cc gas powered blower. The backpack blower reaches full throttle of 650 CFM and 155 MPH in under one second, boosting productivity and control. The blower requires at least (2) M18? REDLITHIUM? Batteries for operation, while providing (2) additional batteries terminals to extend runtime. This battery set-up allows the operator to adjust the number of batteries for either lighter weight in quicker clean ups or more runtime in extended clearing applications. This adjustable battery configuration combined with a fully adjustable harness, mode select, telescoping nozzle, variable speed trigger, and low noise level of just 62dB(A) allow the blower adapt to all the operator's needs when using.