MD300C13 is a very important and common device to check oxygen saturation (SpO2) and pulse rate. As a small, compact, simple, reliable and durable physiological monitoring device, Fingertip pulse oximeter is widely applied in clinic, hospital, social medical organization, first aid and homecare etc. Accurate Measurement Professional Guarantee 1. High brightness LEDs display SpO2, PR, and Pulse bar; 2. Low power consumption; battery-low indicator; 3. Automatically power off ; 2 AAA alkaline batteries; 4. Optional multi-color silicon rubber boot and carrying case; 5. Suitable for pediatric and adult;