I agree with Bert. Don't waste your money on a Mosquito Magnet Liberty. I had one that ran for 6 months and failed. The company replaced it and the new one ran for 5 months and failed. The company will do nothing for me. Just as well. The propane, octanal, nets, clearing cartridges, etc cost about $60 per year. In all the months I ran it the machine never caught 60 mosquitos. At least now I have stopped wasting more money.