It is an innovative Respiratory Muscle Training (RMT) device designed to improve breath support for performance including strength, range and stability. This new device is based on 40 years of clinical success from The Breather and professional athletes using the Breather Fit. BREATHER VOICE and the accompanying BREATHER COACH app are for professional and amateur vocalists, instrumentalists, & professional speakers & actors. You can notice benefits within the first week of use.