The Neptune BS-51 is an innovative 2-in-1 solar charged and battery-operated knapsack sprayer designed for agriculture and garden spraying needs. Featuring an eco-friendly solar panel charging option combined with a powerful 12V 8Ah rechargeable battery and a manual pump, it delivers efficient and high-pressure spraying. The 20-liter tank allows extended spraying sessions while its ergonomic design with padded straps ensures operator comfort. With multiple nozzles and an extendable lance, it offers versatile spray patterns for pesticides, herbicides, fungicides, and fertilizers. The large mouth opening facilitates easy filling and cleaning. This sprayer is perfect for pest control, crop protection, plant nutrition, and sanitation applications, providing a cost-effective, sustainable spraying solution.