This Voldyne Incentive Spirometer has a particulate filter screen in the device housing thT helps reduce risk of foreign matter passing to patients. This Voldyne Incentive Spirometer has a particulate filter screen in the device housing thT 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