Product description Description:1. This allows you to breathe deeply and introduce more oxygen to your blood. Great for athletes, musicians, swimmers, smokers and the elderly.2. Inspiratory and expiratory muscles can be trained simultaneously and adjust their resistance gears independently.3. You only need 10 minutes of breathing exercises to strengthen the expiratory muscles, twice a day, and you can get the results within 2 months.PackageList:1 xBreathing Lung Recovery Exerciser1 x Mouthpiece Directions keep clean
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