Digital Peak Flow Meter,Home Medical with Tracking Software Manually Recording-Accurate & Reliable Spirometer for Asthma COPD Adult Kids Jarxin KEEPS WATER CLEAN FOR DRINKING：The

KEEPS WATER CLEAN FOR DRINKING：The closed design can effectively block the dirt

length 45mm

soft leather

Size - Rod is 6 inches long with 12mm diameter

junction-box or surface mounting

Digital Peak Flow Meter,Home Medical with Tracking Software Manually Recording-Accurate & Reliable Spirometer for Asthma COPD Adult Kids Jarxin KEEPS WATER CLEAN FOR DRINKING：TheBrand: Nascool Features: High accuracy & High repeatability Pressure differential sensor applied ensures the high accuracy. No calibration is needed after manufactured. ATS ERS WRIGHT standards provided. PEF FEV1 automatically display Measuring forced expiratory volume of 1 second (FEV1), peak flow ratePEF). Please blow with proper method, and take a break between each test. Any problem please contact us Portable size & Easy your usage Durable,