Smarter pest control. Add water. Subtract flies. Never touch bait or flies. Lets flies in, but not out. Catch up to 20,000 flies. This product is proven to catch the following species: House fly, lesser house fly, cluster fly, lance fly, secondary screwworm fly, flesh fly, false stable fly, blow flies and bottle flies. Model FTD. rescue.com. Facebook: /rescuepestcontrol. Twitter: (at)rescue. Made in USA.