With these UV insect traps, you can now take advantage of this phenomenon. When dealing with insect problems in the house, the device is simply placed on a flat surface and plugged in. Alternatively, it can also be hung from the ring at the top of the housing. An integrated catch tray at the bottom of the device can be removed for cleaning. We recommend using insect killers before occupying the room. Without distractions from human odors and room lighting, pesky insects find their way into the trap more easily. Be sure to keep the windows closed while the device is active, as you don't want to attract more insects into the house.