The Basic Fingertip Pulse Oximeter by Prestige Medical features all of the expertise you expect from a leading medical manufacturer. The pulse oximeter measures Sp02% (Oxygen Saturation) and pulse and displays them on a clear and easy to read red LED screen. With a low power screen and an auto shutoff feature you should expect up to 30 hours of continuous use. The oximeter comes with a soft silicone protective case, lanyard and two AAA batteries in the box. Includes a one year full manufacturer's warranty.