I have this device birthday get, probably as a little joke, but I'm very happy with it. It has protective screen on both sides, so it's not so easy to capture even electrocuted. if you do, however, it invests, is likely to be surprised by the shock strength. I use the device against annoying mosquitoes, flies and small moths. they are immediately roasted and rendered harmless. with larger opponents I would not recommend it, because it at that degenerates into cruelty and stench. then catch prefer and also escort. with the enclosed batteries, it has been running for 2 months without any problems, so from me 5 stars.