【High Accuracy】Our Finger Oxygen Monitor features the research-grade photoplethysmograph technology that uses infrared light to sense body movement and gather the necessary information to determine high-precision reliable signs. 【Instant to Start】Wear the oximeter to start. Measures blood oxygen saturation, pulse rate, perfusion index and pulse waveform in few seconds and display it on the OLED screen. 【Warning Function】If your blood oxygen is lower or your pulse rate is lower/higher than the preset threshold, this finger pulse oximeter will remind you with a buzzer, and the corresponding reading will flash on the screen. 【Built-in Memory】Up to 12 groups of records can be stored in the record list and can be browsed directly on the device. 【Spot Check Mode】After 30s of stable measurement, the pulse rhythm analysis result will be displayed on the screen.(Can be adjusted to continuous mode). Note: This product is intended for sports and aviation use only. It should not be used to diagnose or treat any medical condition.