Check the listing for details. DEWALT 4-Gallon, 20V Backpack Sprayer, Bare Tool, Model# DXSP190681B. Condition: New. Listed at 249.99 USD. This DEWALT 4-Gallon, 20V Backpack Sprayer features a Lithium-ion, battery-powered pump that is built to finish the job quickly with no more hand pumping needed! Variflo technology allows the operator to adjust the flow for multiple applications using specific nozzles for consistent spraying. This sprayer has a deluxe harness with wide, padded shoulder straps that fit snuggly across the torso and curve to the contour of the user's body. An adjustable hip harness assists with weight distribution, relieving some burden from the user's shoulders. Multiple nozzle tips are included for versatility in both application rates and patterns and can be stored on the included nozzle clip. Comes equipped with a comfort grip handle and lock-on mechanism that can be easily.