Voldyne Incentive Spirometer, 4000 mL

• Volume measurement designed to accommodate large inspired volumes
  
• Particulate filter screen in device housing helps reduce risk of foreign matter passing to patients
  
• Expandable and collapsible tube helps patients find comfortable position for treatments and can be removed when storing the device
  
• Ergonomic swiveled mouthpiece allows to patients create tight seal to enable more accurate measurement
  
• Flow indicator with smiley face provides visual target for desired inhalation and bright green flow indicator make it easy for patients to see results