Product name:Breathing Trainer Product size about : 10*5cm/3.93*1.96in Product color: As shown in the figure Product material:ABS product features: 1. Portable and Convenient: Our portable lung capacity abdominal breathing trainer is designed to be compact and lightweight, making it easy to carry and use anytime, anywhere. Whether you are at home, at the gym, or even on a bike ride, you can easily incorporate it into your exercise routine. 2. Adjustable Resistance Levels: With adjustable resistance levels, our lung capacity trainer allows you to gradually increase the intensity of your aerobic training. This ensures that you can customize your workout according to your fitness level and gradually improve your lung capacity over time. 3. Enhance Lung Capacity: Regular use of our abdominal breathing trainer can help improve lung capacity by strengthening the respiratory muscles. By training your lungs to take in and expel more air, you can increase your endurance and overall respiratory efficiency, making physical activities like cycling easier and more enjoyable. 4. Easy to Clean: We understand the importance of hygiene, especially when it comes to fitness equipment. Our lung capacity trainer is designed to be easily disassembled and cleaned, ensuring that you can maintain a clean and hygienic training experience. 5. Versatile Use: Our lung capacity trainer is not limited to just cycling exercises. It can be used for a variety of sports and physical activities, such as running, swimming, and even weightlifting. By incorporating it into your regular workout routine, you can maximize your aerobic training and improve your overall fitness level. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can feel free to contact mewe will give you some suggestion, but it is for you reference only. Shipment includes: 1 pc Breathing Trainer