Backpack Vacuum Vacuum Power Source Cordless Vacuum Filtration Type HEPA Filter Efficiency 99.97 Percent at 0.3 microns Vacuum Collection Type Bagless Vacuum Capacity 1 gal Vacuum Pickup Type Dry Vacuum Air Flow 55 cfm Static Pressure 75 in Weight 15.2 lb Sound Level 76 dB Motor Efficiency Type Brushless Number of Motor Stages 1 Frequency None Hose Dia 1 3/8 in Hose Length 9 ft Power Cord Length Cordless Plug Type Cordless Voltage 18 V Cordless Tool Battery Type Li-Ion