Fingertip Pulse Oximeter - Safe Heart. An easy to use pocket device which measures oxygen level and pulse rate. Main features include:. Simple operation, small, lightweight/compact design and portable. Display SpO2, SpO2 waveform, PR and Pulse bar. Low power consumption along with low battery indication and auto power off. Accommodates widest range of finger sizes from paediatric to adult (10-22mm finger thickness). Non-invasive