This Pulse Oximeter device is the most efficient and affordable way to check your pulse rates and blood oxygen saturation levels at any time of the day. It has been clinically tested and proven to be accurate and precise. It has a self-adjusting finger clamp that allows it to fit almost all size fingers. The one button design allows for easy and fast testing. The portable sizing allows you to carry it with you for outdoor or on the go use. Ideal for athletes and pilots to obtain quick and precise oxygen saturation readings. Features include an easy to read large digital OLED display and low power consumption on 2 AAA batteries. Integrated SpO2 probe and processing display module plus SpO2 and Pulse Rate and bar. Intended use for checking pulse rates and blood oxygen saturation level at home, in sport and recreational use, such as high endurance and high altitude sports. This device is for Sports & Aviation use only.