Giyosk Breathing Exercise Device for Lungs, Mucus Removal Flutter, Flutter Valve Mucus Removal Device with A Set of Accessories, Breathing Trainer for Lung Cleanse(Blue)

["Natural way of mucus clearance - get rid of your mucus with exercise","Breathing exercise partner - just practice 10 to 30 minutes a day. Get easier breathing and better athletic performance","Easy to use - this breathing exercise device is lightweight and compact, easy to use anywhere. There are no complicated level settings and incomprehensible accessories, the only thing to consider is - which metal ball to choose","Improved shape - it is made of food-grade PP and can withstand temperatures up to 130 ℃. Rotate 30° counterclockwise to easily lock the front end, and the clever curved design fits your fingers better. Get a great user experience","Complete accessories - three different sizes of stainless steel balls are prepared to create different levels of exercises, suitable for adults and kids. Also equipped with a mouthpiece and eight non woven fabric filters"]