Introducing our cheapest medical 3 balls spirometer, also known as a breathing trainer. Our spirometer is designed to help you improve your respiratory function and lung capacity by enabling you to monitor your breath's strength. As a factory, we believe in offering our customers high-quality products at affordable prices. With our spirometer, you can track your progress and improve lung performance by using the three different colored balls to measure the air you breathe out. This portable and easy-to-use device is perfect for patients with respiratory conditions, athletes, and individuals looking to enhance their breathing capacity. Choose our cheapest medical 3 balls spirometer for a practical tool to improve your respiratory health and well-being.