1. Adopt powerful intelligent chip to upgrade data processing algorithm and accurately monitor blood oxygen saturation 2. The rubber finger pad is soft and comfortable, greatly reduces the sense of pressure, and is not easy to fall off 3. Two side shading panels are configured to resist the interference of natural light and improve the numerical accuracy 4. Press the setting key to switch the display in both directions, which is convenient for users to read the value 5. Flashing alarm intelligent reminder 6. Digital display makes the display clearer 7. No signal state, automatic shutdown energy saving (8s) 8. Opening and closing angles are suitable for fingers of different sizes, with soft rubber finger pads 9. Non-slip groove at bottom, integrated back cover with double locking to prevent battery ejection 10. It is suitable for monitoring pulse oxygen saturation and pulse rate of patients in hospital and family 11. Pulse rate measurement range: 30bpm-240bpm 12. Operating temperature: 0-40 degrees celsius 13. Display screen: digital screen 14. Operating atmospheric pressure: 59 kpa-107.4 kpa 15. Storage and transportation temperature: -20 to 55 degrees celsius 16. Batteries: DC 3V 2 x AAA batteries (shipped without batteries) 17. Size: 63x41x31mm 18. Net weight: 30g 19. Gross weight: 70g