Digital Peak Flow Meter Spirometer Asthma COPD for Adult Kids Portable PEF Forced Expiratory Volume FEV1 Lung Tester Home Medical

Why do the test values vary significantly?

Usage methods and physical conditions can affect the results. Airflow blockage may cause PEF deviations.

1. Not inhaling deeply or exhaling forcefully and correctly

2. Respiratory muscle fatigue

3. Leakage from the mouth or nose

How to avoid noticeable deviation test value among each tests?

1. Stand or sit upright before testing.

2. Take a deep breath in

3. Exhale forcefully and as quickly as possible

4. Seal the mouthpiece tightly

5. Take a short break between tests to avoid fatigue and ensure accurate results

Why can't l connect to Bluetooth?

This item not with bluetooth function, app for manually recrod on it

Why there is no arrow to indicate red, yellow and green areas?

Please check if you have set the expected PEF value. No arrow will be displayed on

the device without properly setting the expected value.

Suggestion: If you don't know how to set the expected value, please follow the instruction.

If the device can't display the values properly/ shows E1

Please restart the peak flow to have a try. If you still have any problem please get in touch with us