wo color OLED display、 four display modes?<br />- 4-direction display?<br />- Real-time spot-checks?<br />- Pulse waveform & bargraph display?<br />- Advanced setting for alarm?<br />- Functions of audio alarm and pulse sound?<br />- Automatic power off?<br />- Low power consumption?<br />- 50 hours continuous to work?<br />- Low perfusion?●0.4%?<br />- Low voltage indicator?<br />- Widely used in hospital、 home healthcare、 oxygen bar、 community medical centre、 alpine area、 sports healthcare etc.