A pulse oximeter is a medical device that indirectly measures the oxygen saturation of a patient's blood and changes in blood volume in the skin, producing a photoplethysmograph. This oximeter also displays the heart rate.<br />Material: ABS<br />Color: Blue<br />Size: 58 * 32 * 33mm<br />Display: Color LED<br />Power supply: 2 AAA 1.5V alkaline batteries (not included)<br />Voltage range: 2.6 - 3.6V<br /><br />product description:<br />■ oximetry value display range: 70 to 100% pulse rate value display range: 30 ~ 240BPM<br />■ Resolution: 1% oxygen saturation, pulse rate 1BPM<br />■ Accuracy: oxygen saturation of 70% to 100% segment is ± 1%, less than 70% is not defined, pulse rate ± 2BPM or ± 1% whichever is greater<br />■ Strong ambient light and weak anti-filling ability<br /><br />Package included:<br /><br />Finger Fingertip Blood Oxygen Meter<br />Bag * 1<br />Lanyard * 1<br />English manual * 1<br />Original box packing<br /><br /><br /><img src="http://img6.eachbuyer.com/x9/p100/hc780_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/hc780_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/hc780_3.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/hc780_4.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/hc780_5.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/hc780_6.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/hc780_7.jpg" />