Hand sprayers are compact and lightweight devices ideal for small garden plots or indoor plants. They typically consist of a reservoir that holds the liquid, a pump handle for pressurization, and a nozzle for spraying. To use a hand sprayer, the user fills the reservoir with the desired liquid, pumps the handle to build pressure, and then presses the trigger to release the spray. Backpack sprayers are designed for larger gardens and can hold several gallons of liquid, making them suitable for extensive areas. Backpack sprayers are designed for larger gardens and can hold several gallons of liquid, making them suitable for extensive areas. This type of sprayer is advantageous because it reduces the frequency of refilling while allowing users to cover more ground efficiently.