Description: 【Versatile Breathing Trainer】: This portable breathing trainer is designed to enhance lung capacity and improve breath control, making it ideal for anyone needing deep breathing exercises. Whether you're looking to boost athletic endurance, improve respiratory function, or engage in rehabilitation training, this tool offers scientifically effective support 【Adjustable Resistance Levels】: Equipped with five adjustable resistance levels (20 g increments up to 100 g), this breathing exercise device allows you to customize the intensity according to your training stage and needs. It caters to a wide range of users from beginners to advanced individuals, ensuring diverse exercise goals are met 【Convenient and Portable Design】: With its compact and lightweight structure, this lung exerciser is easy to carry and store. Whether at home, in the office, or on the go during travel, you can perform breathing exercises without being restricted by location 【Premium Construction】: Made from safe materials like PP , PCTG, and PMMA, this lung trainer features a user friendly design that ensures smooth and comfortable breathing processes. It's an ideal choice for family health management, fitness enthusiasts 【Flexible Usage Options】: The respiratory trainer flexibility of use allows you to practice your breathing exercises while sitting, lying down, or standing up. Suitable for both adults and children alike, it encourages consistent practice in daily life for gradual improvement of lung function and overall health enhancement Specification: Material: PP PCTG PMMA Product Size: Tube length 20 cm/7.87 inch Package Includes: 1 Breathing Trainer Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.