A knapsack power sprayer, also known as a backpack power sprayer, is used to apply insecticides, herbicides, fertilisers, and other chemicals to plants. This machine is best suited to agricultural and horticultural applications. It is powered by gasoline and can be carried from one location to another or around farmland on your back.https://perfecthouseltd.com/product/knapsack-power-sprayer-petrol-pa-kps26-4s/