Introducing our Cheapest Medical 3 Balls Spirometer (Breathing Trainer), the perfect solution for enhancing respiratory strength and improving lung capacity! As a factory specialized in producing high-quality medical devices, we take pride in delivering this affordable and durable product. Designed with 3 balls, this spirometer allows users to monitor and track their inhalation and exhalation capacity, providing valuable insights into their breathing patterns. Use it as a breathing trainer to strengthen your respiratory system and improve overall lung function. Trust our factory to provide you with a reliable and cost-effective breathing trainer that will support your wellness journey.