Features: 1SPUTUM CLEARANCE: Increase lun ventilation, promote as exchane, reduce breathin difficulties, reduce postoperative complications, improve couh ability, and help sputum clear. 2STRENTHEN RESPIRATORY MUSCLES: Combine positive expiratory pressure treatment and airway vibration to help mobilize lun secretions, improve lun function, and prevent atelectasis. 3BREATHIN TRAININ: Helps you improve performance durin exercise and other aerobic activities while acceleratin recovery and reducin fatiue time. 4EASY TO USE: It does not require any batteries or medication and is the perfect solution for lon term breathin problems or to aid recovery. Just use it once or twice a day for 5?10 minutes each time. 5AERODYNAMIC DESIN: Meets the oral airflow difference, easy to dischare phlem. Fine workmanship, attention to details, one piece moldin, smooth and mellow.Item Type: Breathin Trainin DeviceMaterial: ABS, AlloyFunction: Breathin traininPackae Included:1 x Breathin Trainin Device