Useless
Don't buy this. Look for something that has both inhale and exhale functions. This only has inhalation so can't measure peak flow or even use to increase breath strength. For asthmatics it's useless.
1-800-565-0333
Airlife Incentive Spirometer
Adult 4000ml
A spirometer is an apparatus for measuring the volume of air inspired and expired by the lungs. A spirometer measures ventilation, the movement of air into and out of the lungs.
Airlife Incentive Spirometer
Adult 4000ml
A spirometer is an apparatus for measuring the volume of air inspired and expired by the lungs. A spirometer measures ventilation, the movement of air into and out of the lungs.