OLED display.
• Measures blood oxygen saturation level (SpO2)
and pulse rate.
• Pulse bar graph and SpO2 waveform display.
• Pulse rate beep sound synchronised
with heartbeat.
• Alarm remind function (SpO2 <88%, pulse rate
<40 or >120).
• Four directions display.
• Low battery indicator.
• Automatic power off.
• Heartbeat mark.
• One button operation.
• Battery voltage indicator.
