This oximeter is a versatile tool that can measure both pulse and blood oxygen saturation rate. Utilizing infrared detection, it provides quick results in just 8 seconds. It is easy to use - simply turn it on by pressing the power button, place your finger inside, and it will instantly display your SpO2 and Pulse Rate in real-time. The 1.5" OLED display is easy to read, with reliable and accurate readings, and the device offers four display orientation options. 2.3" W x 1.25" H x 1.23" D