Medical 3 Balls Spirometer lung exerciser is a useful and reliable breathing training device manufactured by our factory. This product is designed to help individuals with respiratory illnesses, such as asthma, COPD, and bronchitis, improve their lung function. The device comes with three colored balls that rise and fall as you inhale and exhale, providing a visual cue for monitoring your breathing. It is made of high-quality materials that are durable and easy to clean. Our factory prides itself on producing high-quality medical devices that are safe, effective, and affordable. With our Medical 3 Balls Spirometer lung exerciser, you can improve your breathing and enjoy a better quality of life.