The Sure Fire Bugle Adapter is designed to snap onto any bugle tube with a V.E.T.T. system. This adapter is designed for people that cant use a diaphragm call to bugle. The Sure Fire features a replaceable latex reed and Conqueror tongue to create bugles. The upper flap of the Conqueror tongue automatically positions itself against the latex when you use your bottom teeth and apply pressure against it. Simply blow as you apply pressure against the reed to create the various bugle sounds.