This fly catcher is the best effective fly catcher we can find on the market, it use Natural attractant to lure the flies ,when the flies stay on the rotating round disk, enjoying their delicious, they don`t realize they were catched into a dark room, we know all the flies like the light, when they are in the dark room, they will fly towards the light, so they will catched into the transparent hemisphere , we created a small hole on the hemisphere, when they enter it ,they will never fly away. they will died for no food inside and also we can kill them by hot water.