POCKET SPIROMETER - SP-10 Portable, pocket spirometer with TFT display for clear display of numbers and graphs. Synchronized measurement of: FVC, PEF, FEV1, FEV1%, FEV25, FEF2575, FEF75. To facilitate diagnosis, it can display flow-volume and volume-time graphs. Predicted values included. Rechargeable lithium battery and battery charge level indication. Supplied with USB cable for connection to the PC, battery charger and software for calculating data and analysis trends.