* Improve lung function and increase blood oxygen concentration.
* Help to achieve optimal vital capacity and restore interruption of breathing pattern.
* High-quality drop-resistant plastic, reinforced one-piece molding, three-ball inhalation breathing measurement system.
* The operation steps are simple, about 15 minutes of training per day (or use under the guidance of physiotherapist).
* Applicable to children and adolescents, elderly frail, thorax and abdomen surgery rehabilitation, atelectasis, cough weakness, phlegm is not easy to cough, etc.