How to use abc health multiple cameras

1. First, in the test interface, according to the instructions on the page, put your finger at the camera position of the mobile phone. The applet will estimate and measure the index of blood oxygen concentration according to the color change of your finger. 2. Then when the blood oxygen concentration is lower than 93%, it will indicate hypoxemia. Use this technique to place your finger naturally without pressing it. If the mobile phone has multiple cameras, cover the main camera with your finger and flash to ensure that the screen detection area is red. 3. Body temperature, respiration and blood oxygen concentration can be detected in the last 90 seconds.