Lung Capacity Exerciser,portable Breathing Exercise Device For Lungs With Adjustable Resistance For Increase Lung Capacity, Improve Sleep Increase Your Endurance: Helps you get better endurance, Breathing Exercise for Lungs is able to improve your breath for better feelings day by day. Effective and Useful: Strengthens your lung capacity and helps you adjust the abdominal muscles, Lung Exerciser Device makes it possible for you to exercise core muscles. Modifiable Resistances: Provides you with different resistances levels, Deep Breathing Lung Exerciser features adjustable resistances for you to easily change accordingly. Increase Body Performance: Breathing Trainer for Lungs makes an excellent exercise tool to build up your breathing and abdominal muscles, so you can strengthen overall performance. Lung Capacity Augmentation: Brings great help to decrease the accumulation resulted by body waste, Lung Endurance Trainer will reduce the buildup brought on by bodily waste.