275 Gallon Air Blast Sprayer, runs on PTO but also has High-Pressure Diaphragm Pump to apply extra pressure when spraying. Also has 3 gears in back of unit attached to pto, 1, 2 and neutral. When placed in 1 the pressure is lower and when placed in 2 the pressure is greater. Neutral allows you to mix tank with chemicals while not spraying. Sprayer also comes with tractor remote so you can control spray from cab but needs to be re-wired. Used many years with no issues.