Product features:<br />- reliable accuracy and durability<br />- dual color OLED display， four display modes.<br />- 4 - direction display can be adjusted.<br />- low voltage indicator light， real-time spot checks -<br />Low power 50 hours continuous operation.<br />Low perfusion is less than or equal to 0.4%<br />- no signal when the power is off.<br />- small size， light weight， easy to carry<br />Widely used in hospitals， home care， community health centers， oxygen bar， cold， sport and health etc..<br />Specifications<br />DisplayOLED dual color display<br />Oxygen saturation<br />Measuring range: 70 to 99% resolution: + 1% accuracy: + 2% (70% ~ 99%)， unknown (< 70%)<br />Pulse rate<br />Measuring range: 30 ~ 240 bpmResolution: + 1% or + 2% accuracy: + 2BPM (large value) low perfusion is less than or equal to 0.4%<br />Power<br />1.5V (size AAA) alkaline battery voltage: 2.6 ~ 3.6V x 2Supply<br />The working current is less than 30 Ma<br />Auto power offAutomatically power off when no signal in the oxygen saturation of 8 seconds<br /><img src="http://img6.eachbuyer.com/upload/201508/2015080710312955c4188185b4c.jpg" />                                                        <img src="http://img6.eachbuyer.com/upload/201508/2015080710315255c418981ea44.jpg" />                                                        <img src="http://img6.eachbuyer.com/upload/201508/2015080710320055c418a011183.jpg" />                                                        <img src="http://img6.eachbuyer.com/upload/201508/2015080710320655c418a6a8dca.jpg" />                                                        <img src="http://img6.eachbuyer.com/upload/201508/2015080710321355c418ad2e438.jpg" />