Like most consumer pulse oximeters, the MD300C15D likely uses LED light technology to measure oxygen saturation through the fingertip. The accuracy of consumer-grade devices typically varies compared to hospital-grade equipment, and readings can be influenced by factors like movement, circulation, and ambient lighting.
The device probably features a digital display showing both SpO2 percentage and pulse rate. Most fingertip oximeters in this category are designed for quick, spot-check measurements rather than continuous monitoring. Users should follow manufacturer guidelines for proper finger placement and remain still during readings for best results.