COPD screening device that identifies those at risk of COPD at the pre-symptomatic stage. Allows early medical intervention and facilitates better clinical outcomes. Monitors COPD patients using their number: the obstructive index which is based on a percent of predicted. Facilitates case selection so that spirometry can be focused on those likely to be diagnosed with COPD. Screens out anyone with normal FEV1 without the risk of false COPD negatives. Displays FEV1, FEV6, ratio and % predicted, obstructive index, COPD classification and lung age. Displays the GOLD COPD classification (stages I-IV) to help recognise the need for a change in the patients management plan. Built-in quality-of-blow indicator. Large, easy-to-read display. Includes: Screening Device, Carry Pouch, IFU, and AAA Batteries x 2.