The Neptune DK-21 is a versatile 2-in-1 knapsack sprayer that combines battery-powered and manual operation for continuous, uninterrupted spraying. Powered by a 12V 8Ah rechargeable battery and featuring a 20-liter tank, this sprayer offers efficient coverage for gardens and agricultural fields. Its high-pressure 12V single diaphragm pump provides consistent spray delivery with a flow rate of 2.9 to 4.5 liters per minute. The extendable stainless steel lance and four interchangeable nozzles allow precise application for various crops and terrains. Designed with ergonomic padded straps and a durable blow-molded tank, it provides comfort and lasting durability for professional and home use. This sprayer is ideal for herbicide, pesticide, fertilizer application, and sanitization tasks.