The 2-in-1 Knapsack Sprayer is a versatile agricultural sprayer designed for both manual and battery-powered operation. It is ideal for spraying pesticides, herbicides, fertilizers, and disinfectants in farms, gardens, greenhouses, and orchards. The dual operating system ensures continuous work even when the battery is discharged. Its comfortable backpack design, durable tank, adjustable spray lance, and multiple nozzle options provide efficient, uniform, and convenient spraying for various agricultural applications.