The DEWALT 20 Volt Li-Ion Backpack Sprayer was built to outperform outlast and finish the job in less time -- with no pumping needed. The Lithium-ion battery-powered backpack sprayer has Variflo technology which allows the operator to adjust the flow for multiple applications using specific nozzles to deliver consistent spraying. The portable unit comes with a comfortable harness system 20V Li-ion battery-operated pump and 4-gallon tank. It s guaranteed tough and designed for weeding and feeding disinfecting finishing concrete eliminating mold controlling pests and a variety of other spraying applications. Comes complete with spray wand hose 20V 2.0Ah Lithium-ion battery and battery charger.