Oximeter Blood Oxygen Sensor - 4x Blaux Oxi Level 50% Off Features: Larger and Clearer LED Display More Fast, Accurate and Reliable Detection User-Friendly Design Energy Saving and Environmental Protection Hand hold pulse, convenient and easy to use. Small in volume, light in weight, portable to measure it anytime, anywhere. Two directions LED display,and automatic shutdown after 8 seconds when finger is removed saves batteries. Accurate determination of your pulse rate and saturation. Low power consumption,reliable accuracy and durability.