Stainless Steel Mucus Clearance and Breathing Muscle Exerciser

This product is a muscle exerciser that helps people gradually improve their muscle strength and capacity during daily exercise. It comes with three different sizes of steel balls (16/18/19mm) to provide varying levels of resistance, making it suitable for most people. The device is easy to use, requiring only assembly with the steel balls and no additional costs. It is also portable, allowing for exercise at any time. The correct method of use is outlined in the instructions, and using it 1-2 times a day can lead to great results as indicated in the habit development card.