This document provides information on using a peak expiratory flow rate (PEFR) meter and mini peak flow meter to monitor asthma. It discusses that PEFR is used to diagnose, monitor exacerbations, and response to treatment of asthma. A mini peak flow meter allows patients to monitor their asthma by measuring peak flow readings twice daily and recording them on a chart to track variations over time. Instructions are provided on how to use the mini peak flow meter to obtain readings and how to clean and care for the device.