Features:<br />? Dual color OLED display;<br />?Four directions with six display modes;<br />?High accuracy and durability;<br />?Low battery capacity indication;<br />?SPO2，Pulse rate，SPO2 bar graph and pulse waveform display;<br />?Two 1.5V AAA battery power supply;<br />? Automatic switch-off function for power saving;<br />? Operation menu for the function setting;<br />Specifications:<br />SPO2:<br />Measurement range:70%~99%<br />Accuracy:±2% on the stage of 70%- 90%，unspecified(<70%)<br />for SPo2<br />Resolution:±1%<br />Low perfusion:<0.4%<br />PR:<br />Measurement range:30BPM-240BPM<br />?Accuracy:±1BPM or ±1%(the larger one)<br />?Power:two AAA1.5V alkaline batteries<br />?Power consumption: below 30MA<br />Optional configuration<br />Menu function (Power Button and Mode Shift Button 2 in 1)<br />Dimension: 62*32*33mm<br />Net Weight: 45g<br />Retail Box Size: 95*60*40mm<br />Package Weight: 69g