Forced Vital Capacity (FVC), forced expiratory volume in one second (FEV1) to forced vital capacity (FVC) ratio (FEV1/FVC), peak expiratory flow (PEF), forced expiratory flow at 25 % of FVC (FEF25), forced expiratory flow at 50 % of FVC (FEF50), forced expiratory flow at 75 % of FVC (FEF75) and forced expiratory flow from 25 % ~ 75 % of FVC (FEF2575) can be measured.

The personnel information (including height, age, sex, etc.) can be set.

Flow - volume chart, volume - time chart display.

The data can be stored, deleted, uploaded and reviewed.

Trend chart display.

Health state indication.

Calibration function.

Over - limit prompt function for volume and flow.

Bluetooth transmission.

Real-time clock can be set and displayed.

Battery power indication.

Automatic shutdown when there is no operation within two minutes.