Description: 【Portable Design】: This breathing trainer is compact and lightweight, making it easy to carry and perfect for use at home or on the go. Whether you're engaging in yoga, hiking, running, or any aerobic exercise, this device is designed to enhance your respiratory performance 【Material】: Crafted from PP, this breathing trainer ensures durability and longevity. Which is makes it a reliable companion for your fitness journey 【Compact Size】: With a product dimension of 13.94cm, this trainer is designed to be unobtrusive yet effective in helping you improve your lung capacity and overall respiratory health 【Complete Package】: The package includes 1 portable breathing trainer, 2 mouthpieces for versatile use, and 1 charging cable to ensure that you have everything needed for immediate use 【Versatile Use】: Ideal for various activities such as yoga, hiking, running, and other aerobic exercises; this breathing trainer helps enhance endurance by improving lung function across different fitness levels Specification: Material: PP Size Chart: 13.94cm/5.49inch Package Includes: 1x Breathing Exercise Device Set Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.