Product introduction: MD300CF61 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. Color OLED screen displays SpO2, PR, Pulse bar, and waveform; 2. Audible & visual indicationfor SpO2 and Pulse Rate value; 3. Level 1-10 adjustable brightness; 4-direction;