Plug-in indoor insect trap. The trap is incredibly easy to use - simply insert a glue card and plug it into any indoor outlet. You can even rotate the trap to fit as needed. Run the trap continuously for 24/7 indoor protection. Replace the glue card every 30 days or when it becomes full. Whether you are dealing with fruit flies, house flies, moths, or gnats, the Dynatrap Indoor Fly Trap has you covered. Here's how it works: the LED bulb emits UV rays that attract flying insects day and night. Once drawn in, the glue card securely traps them. Trapped insects are discreetly hidden from view on the back of the glue card, so you will never have to see them. Use this versatile trap wherever you see insects - near houseplants, exterior doors, pet areas, in kitchens, garages, bedrooms, and other areas of your home.