This battery sprayer comes with a built in 129W motor, negative ion generator, 1.8L bottle, 20V rechargeable battery. Used for spraying disinfectant to help with sanitizing. It is portable and can create very fine water fog, in home, garden, indoors and outdoors public areas and more. The specially designed negative ion generator produces high concentrations negatively charged that neutralize the positively charged bacteria and dust particles in the air. Combined with disinfectant, the sprayer can kill bacteria effectively.