Maybe a picture of USB. Mosquito killer lamp absorption. Indoor mosquito killer. LED mosquito trap lamp. Electronic Light

Photodynamic Technology: The core component of the mosquito killer is photodynamic material, usually nano titanium dioxide (TiO₂).Under ultraviolet LED lighting, the photocatalyst surface produces strong oxidative hydrogen and oxygen radicals, which can decompose harmful gases and bacteria in the air, and release carbon dioxide and water simultaneously, mimicking the carbon dioxide and water vapor produced by the human body to attract mosquitoes.

Purple light: Using phototaxis of mosquitoes to a certain wavelength of purple light, it emits 360-380 nanometers of purple light through LED to attract mosquitoes closer to the killer lamp.