STEM Flying Insect Light Trap is an easy, mess free option for attracting and trapping a variety of flying insects like house flies, fruit flies, gnats, mosquitoes, and moths. Use this discreetly designed flying insect 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 is easy to use and install. Simply remove protective peels, insert the dual-sided adhesive cartridge into the flying insect trap base, plug in to the wall, and position using the customizable 90 degree rotating plug and leave on 24 7. No need to touch any bugs or get your hands sticky. Replace the cartridge every month or when cartridge is full of bugs. This bug trap is compatible with Raid Essentials light trap refills as well. when used as directed