Working principle: Mosquito phototaxis, the beads of the mosquito trap lamp emit light to attract mosquitoes, plus the micro temperature effect to simulate the humid atmosphere of carbon dioxide, the fan stirs the surrounding air to form a vortex (mode 3). Once the mosquito is sucked into the capture window, it will not escape the vortex and will not be captured. After about a month, the mosquitoes were dehydrated to death. Safety and Health: The mosquito killer uses UV light to attract mosquitoes, fruit flies, gnats, moths, insects and other flying insects into the lamp.The mosquito trap has no toxicity, no chemical substances and no noise. It is an ideal choice for nurseries, pregnant women's rooms and adults, and it guarantees human health and environmental safety. Simple and portable: The interface of the fly zapper lamp is a USB interface, which is suitable for various adapters with USB ports, such as mobile power supplies, computers, power banks and laptops.So you can also make it work with a portable power supply. bank or laptop while camping. Perfect for home, office, kitchens, restaurants, schools, hospitals, patios, yards, etc. You can use this device day or night. However, WE RECOMMEND USING IT IN DARK AREAS WHERE LIGHT IS CLEARLY VISIBLE. Enjoy a mosquito-free environment and say goodbye to painful bites!