Breath Builder Voldyne 5000 Volumetric Respiratory Spirometer Lung ExerciserProduct description Increase your lung capacity with the Voldyne volumetric exerciser! This unit measures the volume of air you inspire and shows you how effectively you are filling your lungs with each inhalation Used properly and regularly, the Breath Builder will increase the amount of air you inhale and can use in a wind instrument It will enable you to increase the volume and pressure of air you use while playing This should result in increased