The Zevo flying insect refill cartridges captures flying insects onto an adhesive backing that you never have to touch. Simply remove sheet from adhesive backing and insert cartridge into the Zevo fly trap and then plug in. Use in the Zevo Indoor fly trap to attract flying insects (houseflies, fruit flies, and gnats) throughout your home for 24/7 continuous attraction. Great for use in kitchens, bathrooms, garages, and living spaces or near sources of food such as fruit bowls, trash cans, doors, house plants, etc.