A pulse oximeter is a small, lightweight device used to monitor the amount of oxygen carried in the body. This noninvasive tool attaches painlessly to your fingertip, sending two wavelengths of light through the finger to measure your pulse rate and how much oxygen is in your system.
Please listen to this video and understand that time for giving the advice to others is over and you need to take care of yourself and your family to tide over the crisis.
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