MHC SureLife® Clearwave II Pulse Oximeter reads the pulse oxygen saturation also known as the percentage of HbO2 in the total Hb in the blood, so-called the O2 concentration in the blood. It is an important bio-parameter for respiration. A number of diseases relating to the respiratory system may cause the decrease of SpO2 in the blood, furthermore, some other causes such as the malfunction of the human body’s self-adjustment, damages during surgery, and the injuries caused by some medical checkups would also lead to the difficulty of oxygen supply in human body. The corresponding symptoms would appear as a consequence, such as vertigo, impotence, vomit etc. Some symptoms may be serious enough to cause significant harm. Therefore, prompt information concerning the patients SpO 2 can help doctors discover potential problems, and is of great importance in the clinical and medical field. Features and Benefits Accurate Reading of Oxygen Saturation and Pulse Rate One-Button Operation Low-Battery Indicator Soft-Padded Finger Insert Automatic Sleep Mode MPN: 860320 Includes Clearwave II Pulse Oximeter Batteries Manual Unit of Measure Contents Sold By Each (EA) 1 Each 1 Total (1 Each)