Designed for both children and adults

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Handle folds down for convenient use

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Measures range from 60 to 810 liters per minute

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Two adjustable indicators set red, yellow, green zones

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Use AsthmaMD app to better manage your asthma

nOA60-810 Features: -Full range meter, designed for both children and adults. -Measuring range from 60 to 810 liters per minute. -Two adjustable zone indicators that correspond with the red, yellow, and green zones of a user's asthma action plan. -Ergonomic mouthpiece and curved contours makes it simple to use and comfortable for patients of all ages. Dimensions: Overall Height - Top to Bottom: -0.9 Inches. Overall Width - Side to Side: -8 Inches. Overall Depth - Front to Back: -5.8 Inches. Overall Product Weight: -0.13 Pounds.