Differential pressure detection technology,

 
can measure over 100 parameters in terms of fvc, vc, mvv and mv functions.
measure inspiratory and expiratory parameters, display the curve in real time.
btps correction function, automatically measures temperature, humidity and barometric pressure.
quality control function, automatic qc evaluation.
rechargeable lithium battery, with charge indicator.
battery performance display.
built-in multiple predictive values.
supports bronchial dilation/provocation test.
pulmonary function assessment.