As you exhale through the device, the steel ball creates resistance to airflow, which exercises the exhalation muscles and strengthens the lungs. Moreover, the exerciser generates air pressure vibrations that loosen airway mucus, and you can remove the loosened mucus by coughing. This breathing exerciser allows you to exercise your lungs anytime and anywhere without complex steps. Ideal for most people to exhale exercise and improve breathing. You can take advantage of this lung exerciser in kinds of occasions thanks to its lightweight and compact size design. Versatile and effective for users of all ages, providing consistent support for better breathing and lung function. Description: Introducing the lung exerciser, a revolutionary breathing trainer designed to improve lung function and promote better respiratory health. Its small size and portable design make it convenient for use anytime, anywhere. The aerodynamic design is tailored to oral airflow differences, facilitating easy breathing and phlegm discharge. This device features a vibrating expectorator that helps in mucus removal and lung exercise, promoting clearer airways and improved breathing capacity. Its fashionable appearance adds a touch of elegance, while its easy-to-clean nature ensures hassle-free maintenance. Whether at home, school, the gym, or outdoors, this lung exerciser is the perfect companion for anyone looking to enhance their respiratory well-being. Item Name: Lung Exerciser Material: PVC, Stainless Steel Features: Small, Compact Size, Lightweight, Easy to Use Size Details: L: 10cm, W: 4cm(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Lung Exerciser