Sonmol has been committed to respiratory health and asthma management for many years, and is constantly researching and upgrading our products to meet the needs of different people. Sonmol 1.0 respiratory exercise device allows you to exercise your lung muscles and improve lung capacity. It's compact and easy to clean. You can just take off the mouthpiece and wash against tap water and letit air dry. Packaging Includes: Lung Exerciser ×1 Mouthpieces ×2