The item CMS50M is made by CONTEC,it is LED screen with SpO2 and Pulse Rate display.Power supply is two "AAA" batteries,there is 1 main unit,1 user manual,1 strip and 1 carry case in the package.Battery voltage is low indication,it will Shut off automatically when ther is no signal.
SP90 Digital Handheld Spirometer Lung Vital Capacity Pulmonary Function+SoftwareBluetooth. Rechargeable
|