The pulse oximeter is used to measure pulse frequency， oxygen saturation (SO2) and perfusion index (PI). They are important data in clinical medical. This LCD Pulse Oximeter is a wonderful device in clinical medical. Made of high quality material， it features high quality， stable performance and long lifespan. Besides， compact and lightweight， it is portable and convenient to carry. With special technology， this pulse oximeter can provide you with precise data. It is easy to use as its simple principle. You will find it helpful and durable.                                    Features             Compact， lightweight and portable to carry<br> Easy-to-use and low power consumption<br> LCD design is easy to catch data<br> Battery power display<br> Auto power off function<br> High accuracy and reliable performance<br> Anti-environmental interference ability <br>                                                            Specifications             Color     Blue    <br> Dimemsions     (2.24 x 1.26 x 1.18)" / (5.7 x 3.2 x 3.0)cm (L x W x H)    <br> Display     LCD    <br> LCD Resolution Ratio     160*64    <br> The Blood Oxygen Value Range     35 ~ 99%    <br> The Pulse Frequency Value Range     30～250BPM    <br> Resolution Ratio     The Blood Oxygen Saturation is 1%; The Pulse Rate is 1BPM    <br> Accuracy     Blood Oxygen Saturation is 70% ~ 99%    <br> Power     No. 7 1.5 V Alkaline Battery    <br>Working Voltage     2.2VDC～3.6VDC    <br> Weight     1.94 oz / 75 g      <br>                                                             Package Includes            1 x Pulse Oximeter<br>1 x Manual<br>