Description: Helps you breathe correctly, train you to take deep breaths, help you open and clear your airways, helps prevent upper respiratory tract diseases such as mucus accumulation, asthma, etc. The more breathing exercises performed properly, the more efficiently the lungs deliver oxygen to the entire body, not only strengthen the respiratory system, but also prevent lung diseases. Easy to use. Your goal is to take a deep breath and float the colored balls in each column, green means you inhale 600 ml / ml, red means 900 ml/ml, yellow means 1200 ml/ml, You can measure and record the maximum inhalation effort. It also helps fight stress and anxiety. When you take a deep breath, it will also clear your mind and get rid of the stress and anxiety caused by daily work and activities. You can easily spend the day actively and positively. Lightweight to carry and clean, easy to put in a bag and carry it with you. You can use it at home, A simple exercise can keep your lungs healthy. Specification: Name: Breathing Trainer Material: PVC Style: three balls Size: Approx.13.7 x 6.5 x16.3cm/5.4 x 2.6 x 6.4 inch Package Includes: 1 * Breathing Exerciser(4 Pack) Note: Insert the breathing tube into the air inlet. Make sure it is firmly connected. Then connect the mouthpiece to the other end of the breathing tube. Next, put the mouthpiece in your mouth. Seal your lips tightly against the mouthpiece. Breathe slowly (deeply inhale) while your lips are still tightly sealed around the mouthpiece. Hold your breath for 3 seconds before removing the mouthpiece. Then exhale slowly. Take a breath and start the cycle again. Your goal is to try to blow the ball as high as possible. First, you may be able to lift the ball in a short distance. But as you continue to practice, you will be able to breathe more air.