Features1SPUTUM CLEARANCE: Increase lung ventilation, promote gas exchange, reduce breathing difficulties, reduce postoperative complications, improve cough ability, and help sputum clear. 2STRENGTHEN RESPIRATORY MUSCLES: Combine positive expiratory pressure treatment and airway vibration to help mobilize lung secretions, improve lung function, and prevent atelectasis. 3BREATHING TRAINING: Helps you improve performance during exercise and other aerobic activities while accelerating recovery and reducing fatigue time. 4EASY TO USE: It does not require any batteries or medication and is the perfect solution for long term breathing problems or to aid recovery. Just use it once or twice a day for 5?10 minutes each time. 5AERODYNAMIC DESIGN: Meets the oral airflow difference, easy to discharge phlegm. Fine workmanship, attention to details, one piece molding, smooth and mellow.SpecificationItem Type: Breathing Training DeviceMaterial: ABS, AlloyFunction: Breathing trainingPackage List1 x Breathing Training Device