Adopted advanced chipset and infrared detector, the pulse oximeter can ensure that you will get accurate and reliable reading. Fingertip pulse oximeter accurately determines your SpO2 and pulse rate and shows conveniently on a large digital LED display. Just put your finger in, and press the button, the readings will show on the display within 8s. One button control makes measurement more convenient and easier, even the kids and the seniors can operate it alone. Our SpO2 sensor supports spot check and displays in real time your pulse rate, oxygen saturation and pulse bar graph which shows the intensity of the signal strength. The pulse rate monitor will automatically shut off when it does not detect your fingers within 5 seconds, which ensures low power consumption. 2* AAA1.5v alkaline batteries (not included) support 600 times measurement and more than 30 hours of continuous working time. Pulse oximeter is suitable for home use and outdoor use and accommodates wide range of finger sizes - children to adult. You should only use the pulse oximeter before or after your exercise. You must remain stationary while the pulse oximeter measure your pulse rate and SpO2 levels.