Tim Grounds Back Flapper Plus Duck Call is a contest ready single reed duck call. Great for hunting too. This call will win on and off the stage. This duck call has a super low end and a ring second to none. World Champion duck callers blow this call and they have said, It will win. They were impressed. This call is very forgiving on your high ball. All Timg Grounds Calls are guaranteed to be properly tuned, free of material defects and ready for use.