Best mosquito killer I've ever used. Mine is setup on a timer to come on at dusk to 1:00 am. Each morning there are piles of dead mosquitoes underneath it. It's been in use for over 4 months it's removed billions of mosquitoes our neighborhood. I've had the big store bug zappers but this one seems to attract better and has a more powerful electrical grid. Actually I don't see much difference in the kill ratio using the bait attractant cartridge that is included with it. I couldn't be happier with this purchase.