Features include an easy to read bright digital OLED display, 30+ hours of continuous monitoring on one set of batteries. Integrated SpO2 probe and processing display module plus SpO2 and Pulse Rate and bar. Low battery level indicator. Auto power off. Low power consumption on 2 AAA batteries. Comes with a hanging neck/wrist strap for use on the move. Intended use for spot check of pulse rates and blood oxygen saturation level at home, in sport and recreational use, such as mountain climbing, high-altitude activities and running. This device is for Sports & Aviation use only and not intended for medical use.