KF-769B Knapsack Gasoline Powered Knapsack Mist Duster
https://www.kaifengsg.com/product/knapsack-mistduster-series/
Motorized Spraying: The sprayer is equipped with a powerful motor or engine that generates air pressure to propel the mist or dust. This motorized operation eliminates the need for manual pumping, reducing user fatigue and ensuring a consistent and even application.