1. One-button simple operation, about 8 seconds to measure the result
2. Two-way display, easier to read
3. If there is no measurement response within 8 seconds, it will automatically shut down, environmental protection and power saving
4. Blood oxygen saturation display: 70-99%, +/-2%
5. Pulse rate display: 30-240BPM, +/-1% or +/-1 BPM
6. Power consumption: less than or equal to 30 mA
7. Power mode: 2 AAA batteries (not included)
