Koolatron Guardian Pro Bite Shield Cordless 1-Acre Propane Mosquito Trap Propane mosquito trap for cordless trapping anywhere Covers up to 1 acre for large city lots, small farms, sports fields Dual attraction system converts propane into carbon monoxide and uses octenol Air flow vacuum sucks in the little blood suckers Vacuum powered by thermoelectric technology for use even where power isnt available