Backpack sprayer with a tank capacity of 15 liters and a flow rate of 0.12 to 1.55 l/min. Three spray speed modes for a wide range of applications. The maximum spray width is 14 m. The spray mist is adjustable from 0.12 to 1.55 l/min. Extremely long working time possible with a second battery compartment. Valve with switch lock. The opening and closing operation of the solution feed valve is locked with the release switch.