This USB Mosquito lamp is quiet and yet it has a decent size for a small space. I personally haven't tried it yet near mosquito areas, but the device works a suction fan when flying insects come nearby. The blue dim light serves as an attraction for mosquitos until they get sucked and trapped inside the device and get fried.
Free of radiation
Easy to clean
Attaching the lower part to the head after cleaning won't easily center the hole where the other end of USB power wire goes. So you'll need not tighten it fully and make sure to center the hole.
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