Measuring your blood oxygen levels regularly allows you to assess your overall health, so that you take early action if required. As an indicator of your overall wellness, it helps you understand the amount of oxygen your body absorbs on a daily basis. Your blood oxygen level is a primary indicator of your overall wellness. It can help you analyse how well your body is absorbing oxygen and the amount of oxygen delivered to your body. This remarkable function allows you to take on-demand readings of your blood oxygen along with the background readings, day and night.