A **finger pulse oximeter** is a compact, non-invasive medical device that clips onto your fingertip to measure your blood oxygen saturation (SpO₂) and pulse rate within seconds. It uses light sensors to provide quick, accurate readings, making it useful for monitoring respiratory health, exercise performance, and conditions such as asthma, COPD, or recovery from illness. Its portable design and easy one-button operation make it suitable for both home and professional use.