Non invasive spot-check measurements of oxygen saturation of arterial hemoglobin  (SpO2). Used with adult and pediatric Patients in extended care, family practice, Sleep clinic and hospital environments. Special Features - SpO2%, PR are displayed on screen simple and convenient operation light, compact (the weight is 50g including batteries). - Low power consumption, two AAA batteries can be continuously operated for 30 hours - Indication of low power consumption - Two display modes