The Baseline 12-1927 Deluxe Fingertip Pulse Oximeter with Waveform is a convenient, reliable method of measuring blood-oxygen saturation (SpO2) and pulse rate. The Baseline 12-1927 is a compact, lightweight unit with a large, easy to read digital display for easy use on the go. The digital display offers SpO2 percentage, heart rate in beats per minute and a real-time plethsmograph (waveform) to indicate functionality of the heart.