The monitor is a non-invasive, handheld patient monitor. It operates only on Common 1.5V AA alkaline or rechargeable battery power. It is compact, small, light, and easy for learning and handling. It is suitable for monitoring adult, pediatric, infant and neonate patients. It is widely used in the hospital’s operation room, ICU, clinic section office, out-patient department, sickroom, emergency treatment, and the recovery and health care organizations, or in the family nursing and in the process of transporting patients. It can also apply to animals selectively. Parameters measured by the monitor include: arterial oxygen saturation (SpO2), pulse rate (PR), pulse strength. The monitor measures these parameters through a SpO2 sensor and displays them on the LED screen after certain further processing. The monitor is operated and controlled by the buttons on the front panel. It adopts LED in displaying measurements and in supplementary status indication.