The Microlife PF 100 is a digital measuring device of peak expiratory flow (PEF) and forced expiratory volume in one second (FEV1) for the respiratory monitoring of asthmatic patients. The device stores 240 measurements and has a USB port allowing measurements to be uploaded to a PC. It’s possible to manage the patient’s respiratory profile with the special Asthma Analyser Software supplied with the product or downloadable from our website.