Key features of the digital spirometer: To facilitate diagnosis, it can display flow-volume and volume-time graphs. Measurements stored on the device can be sent to a computer via USB cable. Alarms sound if capacity or volume drops below set limits. Calibration, Auto power off, Battery indicator, USB charging Screen: 1.8 color LCD Screen resolution: 160 * 128 Battery: Power supply: Rechargeable lithium battery DC 3.7V Technical characteristics of the portable spirometer: Parameters analyzed: - FVC (Forced Vital Capacity) - FEV (Forced Expiratory Volume in one second) - FEV (Vemusulfag)% (FEV/FVC ratio or Tiffeneau index) - DEP (Maximum Expiratory Flow) - DEP (FVC Flow) (25% of FVC flow) - DEP (75% of FVC flow) - DEP (Average flow between 25% and 75% of FVC) Memory: 128 measurements Resolution: 160 x 128 pixels Volume: 0~10 L Volume accuracy: ±3% or 0.05 L (whichever is greater) Capacity: 1 L/s - 16 L/s Capacity accuracy: ±10% or ±0.3 L/s (whichever is greater) Turbine: Reusable Current consumption: ≥60 mA Safety class: Internal power equipment, part applied type BF Dimensions: Size: 97 x 89 x 36 mm Light weight: 150 g. The size of the mouthpiece compatible with this portable spirometer is 30 x 60 mm. Turbine size: 95 mm length, 33 mm diameter. Accessories: SP-10 spirometer, USB cable, lithium battery, PC software (in English), user manual, disposable mouthpiece. We like this spirometer because of: Its size and weight, which allow it to be transported and used wherever it is needed. The way it manages the collected data. Its versatility for use in both clinical and home environments. Features FUNCTION: This spirometer allows you to quickly and easily measure patients FVC, FEV1, FEV1%, PEF, FEF25, FEF75 and FEF2575 frequencies, anytime and anywhere. SCREEN: Medical equipment with 1.8 color LCD screen, which allows real-time analysis of results. SPEED AND PRECISION: This portable spirometer allows you to monitor the patients lung condition with accurate and immediate results. DATA TRANSMISSION: Thanks to the digital spirometer, you can transfer the results to your computer to store, analyze and print them at your leisure. PORTABLE: Thanks to its small size and battery, you will have no problem taking this spirometer with you and using it wherever needed.