1、LUNG CAPACITY TRAINING: Breathing exercises can help improve lung capacity and prevent chronic obstructive pulmonary diseases by improving its function. 2、STRENGTHEN RESPIRATORY: Lung can be strengthened by using these respiratory exercises, which help keep the lungs active and the airways free from contraction. 3、PREVENT DISEASE: Breathing exerciser can improve the efficiency of the lungs to deliver oxygen to the whole body, helping you to better resist aging and disease. 4、STRESS RELIEVE: Deep breath exercise device makes you breathe deeply, help to clear your mind and get rid of the stress and anxiety that comes with daily work and activities. 5、POSTOPERATIVE TRAINING: If you have had surgery and are not breathing well, the breathing lung exerciser can help you maintain and restore normal breathing. 1 x Breathing Exerciser1 x Bellows1 x Manual Item Type: Deep Breathing Lung ExerciserMaterial: PlasticSize: Approx. 13.7 x 13.3cm / 5.4 x 5.2inCapacity: 600ml, 900ml, 1200ml