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SMART
handheld device that measures how well air moves out of your lungs. During an asthma episode, your airways often narrow. A peak flow meter can measure this narrowing hours, even days, before you have any asthma symptoms.If you get a peak flow score that's lower than your best score, this may be a sign of an asthma attack.
| Country Of Origin | United Kingdom |
| Operation Mode | Manual |
| Product Designation | General |
