Nonin 9590 Onyx Vantage Fingertip Pulse Oximeter - Black Four (4) years warranty. Lead & Latex Free. Made in the USA! In 1995, Nonin Medical revolutionized pulse oximetry by inventing the world's first finger pulse oximeter, the Onyx 9500. Today, Nonin's latest finger pulse oximeter for health care professionals, the Onyx Vantage 9590, provides a fast, accurate, cost-effective solution for spot-checking oxygen saturation and pulse rate in pediatric to adult patients. Available in Black....