Feature 1SPUTUM 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 510 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.Item Type: Breathing Training DeviceMaterial: ABS, AlloyFunction: Breathing training .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Breathing Training Device