Size: closed crotch 40

(Comes with ink cartridges)

Quick to set up and easy to adjust volume for a comfortable listening experience

medium children's wear (7-12 years old)

Color LCD, Handheld Rechargeable Bluetooth Spirometer, Lung Monitor PC Software Bathroom Essentials Size: closed crotch 40Introduction The SPIROMETER is a hand held equipment for checking lung conditions, adopts the infrared signal acquisition mode for measuring items related to FVC, and is applicable for hospitals, clinics, and family routine tests. Functions 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