2023 is the upgrade The design of UV light insect traps is based on the phototaxis of flying insects. The plug-in fly traps for interior usage emit UV light waves that are attractive to insects and can draw mosquitoes, fruit flies, gnats, moths, and a variety of other insects when utilized. The yellow strong glue card on top will adhere the drawn-in flying insects, preventing them from escaping. 5 adhesive cards as a gift will make the flying insect problem simple!