The Nonin Onyx Vantage 9590 is a valuable tool in any situation where a fast and accurate reading of blood oxygen saturation and pulse rates are needed. The Nonin Onyx Vantage 9590 fingertip pulse oximeter is intended for use by health professionals. • Easy-to-see LED SpO2 and pulse rate can be read from any angle. • Three-color pulse quality indicator LED Provides a quick assessment of patient pulse quality. • One product for both pediatric to adult patients - Accommodates a wide range of finger thicknesses: 8 mm to 25.4 mm • Proven durability when accidentally dropped • Automatic turn on and off • Portable and light weight.