Use these refill cartridges for the STEM Flying Insect Light Trap, an easy, mess-free option for attracting and trapping a variety of flying insects like fruit flies, gnats, mosquitoes, and moths. Use this discreetly designed fruit fly trap in any indoor room where insects are present, especially around fruit, trash cans, garages, and entryways.Enjoy the odor-free, soft blue light technology that traps insects with no chemical insecticides. We crafted our moth and mosquito trap to be people-, plant-, and pet-friendly for 24/7 continuous attraction.It’s easy to use and install. Simply remove the protective peels, insert the dual-sided adhesive cartridge into the flying insect trap base, plug it into the wall, and position using the customizable 90-degree rotating plug. Leave it on 24/7. No need to touch any bugs or get your hands sticky. Replace the cartridge every 14 days or when the cartridge is full of bugs.When used as directed