Backpack Concrete Sprayer kit delivers the industry's first interchangeable tank design with no manual pumping. Designed to meet the needs of concrete contractors, the battery-powered concrete sprayer delivers instant, constant and adjustable pressure up to 120 psi and a 25 ft. spray distance. The 5-mode pressure adjustment knob allows users to adjust the pressure between 20 psi to 120 psi, delivering the capability to complete a wide range of applications. The M18 REDLITHIUM XC3.0 Battery provides users with up to 12 tanks of spraying per charge. Concrete Sprayer Tank Assembly features a dual diaphragm pump for longer pump life and Viton seals for increased durability against harsh chemicals. The backpack frame includes wide straps providing users with added comfort during extended spraying applications and a handle for convenient transport and storage. Concrete Sprayer is made up of 2 components the M18 SWITCH TANK Powered Base and the SWITCH TANK 4 Gal. The Powered Base includes the motor, battery compartment and REDLINK electronics while the interchangeable Tank Assembly includes the pump, hose and wand. Includes: 1 M18 SWITCH TANK Powered Base, 2 SWITCH TANK 4 Gal. Concrete Sprayer Tank Assembly, 2 Stainless Steel Wand, 2 Adjustable Nozzle, 2 Fan Nozzle, 2 Angled Nozzle Adaptor, 1 M18 REDLITHIUM XC3.0 Battery, 1 M18/M12 Multi-Voltage Charger.