This photocatalytic insect killer uses LED light that emits with a 365nm wave length, which is the best frequency to attract insects such as mosquitoes. Mosquitoes will fly near and are then killed by a high voltage grid. There is a convenient tray on the bottom so that dead bugs can be cleaned out easily and effortlessly. Place the lamp in a dark part of the room, keep door sand windows closed and leave it to do its work.