CMS50QA is a pulse oximeter that can be used in measuring the pulse oxygen saturation and pulse rate through the finger. Its SpO2 probe and processing display module are integrated. It is lightweight and convenient to use. The operation of the product is simple. Its power consumption is low. It displays the SpO2 and PR value in a bar graph. The device also has a pulse rate sound indicator. The device will automatically power off within 5 seconds if the probe falls off from the finger. With its small appearance, it’s fit for use in small children. Its only display mode is its TN segment LCD display. The device’s SpO2 measuring range is 0%?100%. Its PR measuring range is 30bpm?250bpm.