Type:Blood Pressure Monitor Instrument classification:Class II Product name:Fingertip Pulse Oximeter Type:Blood Testing Equipments Display Mode:Four Directions Memory:2*90 Memory SPO2:35-99% Pulse Ratio:30-255 BPM Pleth Wave:OLED Graphic Display Battery Voltage Low Indication:OLED Bar Graph Power Requirements:Two AA size 1.5V Alkali Battery Resolution:1% for SPO2 and 1 BPM for Pulse Ratio Show More