Compact and easy-to-carry pulse oximeter. Rotating OLED screen is energy-saving and convenient to read at different angles. Display parameters: SpO2, Temperature, Heart Rate, PR, Perfusion Index, Plethysmograph, PP, PPG. Anti-shake function with imported chips, which can be measured under static and dynamic conditions. Intelligent alarm: set the upper and lower limits of blood oxygen saturation, pulse rate, and body temperature. Measuring accuracy: SpO2 90-99%, ±2%, 70-89%, ±3%; pulse rate: ±3bpm; temperature: 25- 45°C (77-113°F), ±0.1?.