Fingertip Pulse Oximeter (OLED Display) $34 OLED Display Fingertip Pulse Oximeter Modernize your freediving training with this tiny and easy-to-use fingertip pulse oximeter with OLED display! One of the most important things to do during dry-training is to monitor your level of oxygen saturation. The oximeter uses the latest in infrared technology to monitor the SpO2 levels. This portable device measures your pulse rate and blood oxygen saturation quickly and accurately! Benefits in using oximeter during a dry breath-hold: √ Predict your maximum possible breath-hold length, without actually holding your breath for very long √ Measure your breath-holding capacity with only a short breath-hold test As you progress, after the same length of breath-hold, you will reach higher and higher oxygen saturation!