The Select A Bull features a tone selector which allows the user to simply dial the bull sounds desired, small, medium or large with true back pressure. The expandable outside tube expands to 23" and collapses to 17" for better compaction and ease when carrying. The Tube Tamer produces better sound quality, and coupled with the Conqueror external mouthpiece even novice callers can use this tube. Remove the Conqueror mouthpiece for diaphragm use. Includes an extra Palate Plate replacement reed, non-slip camo cover, protective cap for mouthpiece and lanyard.