Keep track of your oxygen levels with this Santamedical SM-1100S OLED Finger Pulse Oximeter. Features include an easy-to-read bright digital OLED display, 30+ hours of continuous monitoring on one set of batteries and an integrated SpO2 probe and processing display module. This portable finger pulse oximeter also has a SpO2 and Pulse Rate and bar. The low battery level indicator lets you know when it's time to change the batteries. It also features an auto power-off function and runs on 2 AAA batteries with a low power consumption. It comes with a hanging neck/wrist strap for use on the move. These home health care products are intended to be used for spot check of pulse rates and blood oxygen saturation level. It's lightweight with a small portable size that makes it easy to handle and carry. It's a practical choice for at-home, in-sport and recreational use, such as mountain climbing, high-altitude activities and running.