MILWAUKEE M18 BPFPCS-0 15L Switch Tank Backpack Chemical Spray - 4gallen/15litter tank capacity - Interchangeable tanks, no manual pumping - Add-on and Interchange Tank Assembly to Eliminate Cross-Chemical Contamination - Instant, Constant and Adjustable Pressure for Ultimate Control - Replaceable Tank Assembly Delivers Lower Cost of Ownership - Up to 12 tanks per charge- using M18 5.0Ah Battery - Up to 120 PSI & 7.6m Spray Distance - Critical seals: Viton for increased durability against chemicals - Wide Mouth Opening and Strainer: For Easier, Debris Free Pouring - Transport Handle for Convenient Transport and Storage - Dual Diaphragm Pump: For Longer Pump Life - Wide Straps for Comfort During Extended Duty Cycles - 2 years warranty What's in the box ? BARE TOOL - 1 x MILWAUKEE M18 BPFPCS-0 15L Switch Tank Backpack Chemical Spray (*WITHOUT BATTERY & CHARGER) ADD ON SET - 1 x MILWAUKEE M18 BPFPCS-0 15L Switch Tank Backpack Chemical Spray - 1 x MILWAUKEE M18 5.0AH Battery - 1 x MILWAUKEE M12-18C Charger - 1 x MILWAUKEE Medium Contractor Bag