Technical Parameters
1. Display mode: LED display
2. SPO2 measuring range: 35%-100%
3. Pulse rate measuring range: 30bpm-240bpm
4. Pulse waveform display: Bargraph display
5. Low battery indication: LED display
6. Power supply Requirement: 1.5V(AAAsize) Alkaline Batteries*2;
7. Working current: <=25mA
8. Resolution: SPO2: 1% Pulse Rate: 1bpm
9. Accuracy: SPO2: 70%to100%(+. -)2digits, below70%unspecified Pulse rate: (+. -) 2bpm or(+. -)2%(select larger)

10. Measurement at Low Perfusion: The values of SPO2 and pulse rate can be displayed properly when pulse saturation is at0.4%.
11. Accuracy of SPO2: (+. -)4%
12. Accuracy of Pulse Ratio. (+. -)2BPM or (+. -)2% (Select Larger)
13. Resistance to surrounding light: Deviation is smaller than (+. -)1% between value of Oxyhemoglobin measured in natural lighting indoor condition and present lighting sources and that measured in dark room.
14. Automatic shutdown function: The device will power off automatically within 15. seconds whenthere is no finger in the device.