"""Color OLED display, simultaneous display for testing value and plethysmogram. - The display interface of OLED can rotate four directions with six different display modes after pressing the power button for less than 0.5s. - Real-time spot-checks - Pulse waveform & bargraph display - Advanced setting for alarm - Functions of audio alarm and pulse sound - Automatic power off - Low power consumption down to 0.3% - 50 hours continuous to work - Low perfusion ≤0.4% - Low voltage indicator - Widely used in hospital, home healthcare, oxygen bar, community medical centre, alpine area, sports healthcare etc. """