Unlike battery powered tow behind sprayers, the Chapin 97650 15-Gallon EZ Tow Peristaltic Tow Behind Sprayer is ground driven. The tube compression Peristaltic pump ensures a flow rate proportional to the speed of the tractor or ATV towing it. The principle of the peristaltic pump system is three turning rollers which flatten the flexible hose to force liquid through a nozzle. There is no need to pressurize or pump air into the tank. This unique, battery-free system features a 5.5-foot horizontal spray pattern nozzle, translucent tank with wide mouth opening and drain plug for easy filling and cleaning and pneumatic tires for stability over uneven terrain.