Product introduction: MD300CF3 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. Dual color OLED displays SpO2, PR, PI, plethysmogram and pulse bar; 2. Audible & visual indication for SpO2 and Pulse Rate value; 3. 6 display modes; level 1-10 adjustable brightness; 4. Automatically power off; battery-low indicator; 5. Durable battery cover design; 6. Suitable for pediatric and adult;