Based on the popular 737 "No.1" design, the "DOS" double reed model was developed. Built to be more forgiving for the caller, this call is super easy to blow and operate. A great choice for beginners or average callers; the "DOS" is a pure hunter. Medium to high volume call on the top end with a raw ducky super subtle low end that can be used in all setups from open water to flooded timber. FeaturesEasy to operateMedium to High volume top endRaw ducky super subtle low end