Product characteristics:
It's a hand-held pulmonary function check, measured by infrared interdictionFvcI don't knowFev1, fev1/fvc, pef, etcI don't know,Daily lung function tests applied to hospitals, clinics；
:: appearance design, concise fashion
Small size, light weight and easy to carry
A case review function
Large volume medical records storage, storeableArticle 9999；
Six seconds to breatheFunctions；
BluetoothUsb data transfer function
Mark function to ensure test accuracy；
Power and test light instructions；