This simple handheld spirometer features a high performance Fleisch flow measuring technology and displays key spirometry parameters. It also enables spirometry reports to be printed from your PC. Single breath evaluation of FVC, FEV1, FEV1% and PEF Complete with Vitalograph Reports PC software creating PDF reports Report includes f/v and v/t curves with test quality, predicted values and interpretation Parameters FVC, FEV1, FEV1%, PEF, FEV6, PEF, FEF25, FEF50, FEF75, FEF25-75 Tested and certified to ATS/ERS:2005 spirometry guidelines Uses standard size SafeTway disposable mouthpieces for assured hygiene Fleisch technology flow sensor gives low back pressure High visibility liquid crystal display with large numerals and icons