Rainmaker 18 Volt Lithium Ion Backpack Sprayer 4 GallonAll purpose sprayer ideal for herbicides, pesticides, liquid fertilizer and many home applications! This sprayer requires no manual pumping and is ideal for large jobs. The Rainmaker Lithium Ion Backpack Sprayer is powered by a removable and rechargeable lithium ion battery pack (included) that can last for hours on one charge. Other features include a high and low speed flow rate switch and 3 different sprayer nozzles. The trigger has a lock on