Portable Lung Training Device With Adjustable Intensity Knob

SPECIFICATIONSBrand Name: NoEnName_NullHign-concerned Chemical: NoneOrigin: Mainland ChinaWith its small size and adjustable intensity, it's a good accessory for daily fitness and exercise use. Product Name: lung trainer for athletesProduct Material: Silicone ABSProduct List: lung trainer for athletes * 1pcsSee more product details1.Enhance overall endurance: By using this lung trainer regularly, you can improve sports performance, help challenge yourself, and improve exercise effect progressively.2.Improve lung capacity: Boost performance with our lung trainer that helps expand and improve lung capacity without excessive aerobic exercise or calorie consumption.3.Portable design: With our lung trainer's portable design and small size, athletes can train their respiratory muscles on-the-go. By enhancing respiratory strength and endurance, they can achieve top performance during any activity.4.Progressive Intensity: Elevate your endurance with our lung trainer for athletes. The adjustabl