The Birchmeier REB 15 AC1 Battery Backpack Sprayer with CAS Battery Pack is a four gallon pressure controlled battery powered backpack sprayer. This sprayer offers a consistent spray pattern, adjustable droplet size, redefined ergonomics, adjustable operating pressure (0.5 to 3 bar) and a quick-change system for the battery pack. It has a front hose outlet, click-belt system, 60 cm. brass spray tube, and a protective setup for the pump and battery pack. 1.7mm adjustable nozzle.