1. Improve Lung Capacity: Breathing exercise device increases lung capacity, promotes gas exchange, reduces breathing difficulties, prevents recurrent infections. 2. Reduce Fatigue: Breathing exerciser helps you improve performance in sports and other aerobic activities while speeding up recovery and reducing fatigue time. 3. Principle: Breathing lung trainer combines positive breath pressure with airway vibration to help mobilize lung secretions and improve your lung function. 4. Daily Use: Lung breathing exerciser is the solution for long term breathing problems, you only need to use 5-10 minutes once or twice a day for breath recovery. 5. ABS Alloy: Handheld breathing exerciser is made of ABS and alloy materials, safe and sturdy, which can effectively improving your breathing, good for lung health. Spec: Item Type: Breathing Exerciser Material: ABS, Alloy Function: Breathing training packing list: 1 xBreathing ExerciserABS Alloy: Handheld breathing exerciser is made of ABS and alloy materials, safe and sturdy, which can effectively improving your breathing, good for lung health. Daily Use: Lung breathing exerciser is the solution for long term breathing problems, you only need to use 5-10 minutes once or twice a day for breath recovery. Principle: Breathing lung trainer combines positive breath pressure with airway vibration to help mobilize lung secretions and improve your lung function. Reduce Fatigue: Breathing exerciser helps you improve performance in sports and other aerobic activities while speeding up recovery and reducing fatigue time. Improve Lung Capacity: Breathing exercise device increases lung capacity, promotes gas exchange, reduces breathing difficulties, prevents recurrent infections.