Based on digital technology, the finger pulse oximeter non-invasively measures the current content of oxyhaemoglobin (Hb02) in the arterial blood by optical transmittance. The finger pulse oximeter measures human oxygen saturation and pulse through the finger artery. It is used in many fields: home, hospitals, oxygen bars, nursing homes, sports clubs, etc. You can use this device before or after playing sports, but the use of this oximeter in sports is not recommended. Do not use in the event of intensive, continuous therapy.