A china fingertip oximeter is a medical device used to measure the oxygen level in a person's blood. It is a small, portable device that clips onto the end of a finger and measures the amount of oxygen in the blood by shining a light through it. The device then displays the oxygen saturation level, which is a measure of how much oxygen the blood is carrying. Fingertip oximeters are used in a variety of settings, including hospitals, doctor's offices, and at home. They are an important tool for monitoring a person's oxygen level, especially for those with respiratory conditions, such as COPD or asthma.