The pulse oximeter can be used to measure human Hemoglobin Saturation and pulse rate through finger, and indicate the pulse intensity by the bar-display. The product is suitable for use in family, Oxygen Bar, excercise gym etc. Features: Under normal condition without operation or testing dataautomatic shutdown after 10 seconds. Enter the setting interface without operation or testing data automatic shutdown after 40 seconds. Single button operation mode: long press choice, short press the switch. After the measurement time is two and a half minutes. the screen brightness will dim, and the brightness will be adjusted to the lowest state (here the lowest state refers to the lowest value that can be set below the brightness). Enter the power-saving mode, press the button to exit the power-saving mode, or you can reactivate the finger to exit the power-saving mode. Precise measurement of SPO2 and pulse rate. Suitable for use in family, hospital£¨ordinary sickroom£©, oxygen bar, social