The new EGO POWER 600 CFM backpack blower performs better than many gas models; it is also 8 times quieter and weighs half as much as comparable gas fans. Turbine-fan engineering moves air at 600 CFM. The variable speed control lets you sort the power up or down for greater control, from 320 cubic feet per minute to 600 cubic feet per minute, and the turbo-knob gives you maximum power for power. heavy scrapping. The high-efficiency backpack brushless brushless motor provides longer run time, low vibration and extended service life. The EGO POWER 56V Advanced Battery uses cutting-edge Arc-LithiumTM technology to deliver Power Beyond Cief and is compatible with all EGO POWER products.