The Primos MTA Mouth Call Pak and instructional CD is all you need to either get started or perfect your mouth calling technique. The in-depth CD will teach you just how simple and effective the mouth call is to use. Listen and practice along with Will Primos and Troy Ruiz as they give you detailed instructions and tips on how to become an expert caller. Three easy-to-blow calls are included with the CD, to help you figure out what type of mouth call suits you best. In this new MTA Pak, the mouth calls included are Will Primos Signature Series, A-Frame Double with Double Cut and Limb Hanger.