Works well maybe too well.  It is a small device but packs a loud, morbid punch. I thought the instructions were exaggerating when they recommend putting the device 25-30 feet away from the "protected" area.  That is not idle chatter.  The device zaps bugs in a loud taser-like shock. Bugs large and small. In fact, it attracted bugs I had never seen before or thought were pests! It attracts everything and zaps them as soon as it comes in contact with the inner chamber. It's loud and a bit jarring after a while. You are left with a puddle of dead bug shells.