Features and Benefits:Powerful BL™ Brushless Motor generates 70 CFM of suction power and 44" of water lift;Up to 116 minutes of continuous operation on normal setting and 33 minutes on max setting using two 18V LXT® 5.0Ah batteries BL1850B;Efficient two stage HEPA filter captures 99.97% of particulates .3 microns and larger extending the life of the main filter;The BL™ Brushless Motor eliminates carbon brushes, enabling the BL™ Motor to run cooler and more efficiently for longer life;Convenient and easy to replace disposable filter dust bag;Push button power selection controller for (max/high/normal) operation;conveniently attaches to harness waist belt;Built-in L.E.D. light on the controller illuminates the work area;Compact and lightweight design;weighs only 9.9 lbs. with batteries;The Backpack Dry Vacuum is powered by two 18V Lithium-Ion batteries for 36V power and performance but without leaving the 18V LXT® battery platform. The efficient BL™ Brushless Motor generates 70 CFM of suction and 44” of static water lift for fast clean-ups and improved dust extraction, with no cord to pull along or get in the way. The Backpack Dry Vacuum weighs only 9.9 lbs. (with empty dust bag and two 18V 5.0Ah batteries) and has padded shoulder straps and waist belt with multiple adjustments for a comfortable fit. Cordless and compact, the push button power selection controller attaches to the waist belt of the harness for convenient operation, and the 39” flexible hose has a telescoping extension wand with 20” ‐ 34” of additional reach. The efficient HEPA filter captures 99.97% of particulates .3 microns and larger extending the life of the main filter, and the half-gallon dust collection container is easily removed for dust disposal. When using two 18V 5.0Ah batteries, users will get up to 116 minutes of continuous operation on normal setting and 30 minutes on max setting. It�s part of Makita�s expanding 18V Lithium-Ion system, the world�s largest cordless tool system powered by 18V Lithium-Ion slide-style batteries. Makita 18V Lithium-Ion batteries have the fastest charge times in their categories, so they spend more time working and less time sitting on the charger.