Jumper JPD-500E OLED version fingertip which is used to measure pulse rate. SPo2 / PR / PR waveform / bar graph and perfusion index monitor are all examples of pulse sound function. If there is no signal after 10 seconds, the power is switched off automatically, low-voltage indication, demo mode and pulse sound function, alarm function, OLED display with brightness adjustable, six display modes, four directions display, blood perfusion index, CE & FDA approved, origin China.