This thing is incredible! CHEMICAL FREE…no insecticides, multi-insect killer, that works immediately! If you’re sick of all the flies coming in, this thing is a great, safe option for the kids. The blue light draws them in and then traps them in the sticky goo🙌🏼🙌🏼. Plug them in around the house to catch them all. Replaceable cartridges. LTKhome LTKfamily