3 Review(s)

Pulse Oximeter Rotatable OLED Display to Show Waveform SpO2 Blood Oxygen Saturation Bar Graphs and Heart Rate Monitor Each wave corresponds to a heart beat and the wave amplitude corresponds to the amount of blood detected. If the wave amplitude is low, this means that your blood perfusion is too low for a reliable read. You should retake your measurement and make sure that your finger is positioned right under the LED lights. Bright LED Display The bright LED display allows use in low light. Battery is included.