Features: 1. Integrated with SPO2 probe and processing display module. 2. Small in volume， light in weight and convenient in carrying. 3. SPO2，PR and PI display. 4. Pulse rate value display， bar graph display. 5. Low-voltage indication: low-voltage indicator appears before working abnormally which is due to low-voltage.6.Automatically power off function: when the device is under the state of measuring interface.7. It supports wireless bluetooth 4.0 smart pulse oximeter for use with both android and IOS system.8. Auto shut off: 10s9. OLED display， adjustable brightness10. SPO2: 35-100%11. Pulse Ratio: 25-250BPM12. Resolution: 1% for SPO2， 1BPM for pulse ratio13. Accuracy: +-1%(70%-100%)， unspecified(<70%) for SPO2， +-1BPM or +-1%(select larger) for pulse ratio14. Power: 1.5V(AAA size) alkaline batteries*215. Size: 62*37*32mm