Proback 12v Diaphragm Pump Battery Powered Backpack Agricultural Sprayer 4 Gallon Five Speed Water Flow Garden Free Shipping Water Tank Capacity: 16L 4 gallon. White durable tank. Battery: 12V 12A; Battery Charger: 12V 1.5A Diaphragm Pump: 12V 4.0L 1.1GPM 70PSI. Applicable for agricultural use. Five speed water flow adjustable. More choices of spraying rate, users can adjust the flow rate by five shifts from low to high according to the spraying situation. Accessories: Telescopic stainless steel lance from 31.5 inch to 51 inch max, conical adjustable brass single nozzle, 1M hose, plastic double nozzle & triple nozzle.