Product Description High sensitivity and low resistance ultrasonic flow transducer , accurate & reliable, excellent curve repeatability RECO for the disposables, Perfectly eliminate cross -infection Automatic 0:00 calibration Real-time BTPS correction Software Features Support projected values for different ethnic groups Real-time and dynamically breath curve display which enable to assist operators make breath method guidance Automatic filtering to remove interfering signals and unstable waveforms, the operator can also manually adjust the curve Support to manually adjust the breathing curve of Tidal breath flow volume loop(TBFV) Automatically select the best results according to ATS/ERS standards SQL database with excellent confidentiality ,mass storage, efficient data reading