Digital Spirometer VC Lung PEF FEFV1 FEF Lung Volume 1. Digital Spirometer is a hand-held equipment for testing pulmonary conditions. It adopts the infrared stop mode for measuring relative items and is applicable for the hospital, clinic, family for a routine test. 2. Designed for everyday home and professional healthcare. 3. Low weight and portable size. 4. LCD screen, 1.8 inches with LED backlight. Features Basic analysis and status display Display speed and volume time waveform Internal flash memory for data storage and the storage data can be uploaded to the computer through USB or wireless transmission. Model: Digital Spirometer Machine Maximum volume: 10L Flow range: 16L/s Volume accuracy: 3% or 50ml Flow accuracy: 5% or 200ml/s Battery: built-in rechargeable lithium-ion Dimensions: 97 * 89 * 36 mm Package Contents 1 * Digital Spirometer 1 * USB Cable 1 * Disposable Mouthpiece 1 * Software CD 1 * User Manual For all home care products(not including accessories) you purchase from Homecarewholesale.com, get a worry-free 1-year warranty and friendly 24 hours customer service. Enjoy your shopping freely at Homecarewholesale!