1、Four directions, one‑click for reading, humanized details design, portable size, convenient for carry. 2、Using high‑definition LED digital tube display, measurement results are clear display for easy reading. 3、The infrared measurement is transmitted within five seconds, blood oxygen is collected by photoelectric sensor principle, fast and accurate. 4、Numerical and graphic diversified display of blood oxygen saturation, and pulse rate measurement at the same time. 5、Providing comprehensive healthy information, light Weight, accommodates wide range of finger sizes.