The 12L multi-purpose knapsack sprayer from Defenders is designed and built for clean and easy application of garden chemicals and plant foods, as well as other home-care products, including disinfectants and detergents. The fast-action piston pump will deliver high-pressure flow of any liquid spray through the ergonomically designed hand lance, which features a lockable trigger for easier operation. On/off switch and even fan-shaped spray applicator.