Features 1.3 Colorful Balls: Breathing exercise tool includes 3 balls, with different colors, which can help you maintain and restore normal breathing. 2.Healthy Lungs: Regular breathing exercises not only strengthen the respiratory system, but also keep your lungs healthy and prevent lung disease. 3.Stress Relieve: Breath exercise device makes you breathe deeply, help to clear your mind and get rid of the stress that comes with daily work. 4.Ball Floating: Just take a deep breath and float the colored balls in each column, red for 600 ml, green for 900 ml and yellow for 1200 ml. 5.Portable Size: Deep breathing exercise device is small in size and light in weight, which is easy to be put in a bag or pocket for convenient carry. Specification Item Type: Deep Breathing Lung Exerciser Material: Plastic Size: Approx. 13.7 x 13.3cm / 5.4 x 5.2in Capacity: 600ml, 900ml, 1200ml Package List 1 x Breathing Exerciser 1 x Bellows 1 x Manual