The Breather Respiratory Lung Muscle Trainer Breathing Training ExerciserAbout the product Stronger mouth seal Listed cmH2O pressure per dial setting Inspiratory and expiratory settings operate independently Ergonomic design for poor hand strength Easy to use and clean Product description The Breather 1. 1 is a respiratory muscle trainer (RMT) used by COPD, CHF, Dysphagia, and Neuromuscular Disease patients to improve dyspnea, QOL, speech, and swallow performance. It trains both inspiratory and expiratory muscles