1、Muti-function: Digital pulse oximeter can be used to measure pulse rate, blood oxygen saturation levels accurately. 2、Easy to Use: Accurate and reliable, one button operation, just clip it on to your finger and turn it on at the press of a button. Automatic power off after 8s when not in use. 3、Quicker Display: The oximeter adopt advanced sensing technology, the test results will be displayed on the screen after 5s. No need to wait. 4、Easy to Read: Low power consumption, LED display, 2 directions can be adjusted for conveniently reading. Even the elderly, also can accurately and easily read the values. 5、Widely Applicable: Lightweight and portable, widely used at home, personal care in sports or travel. Measuring your health at any time. Note: Insert 2 * AAA batteries and pay attention to the battery polarity indication. When put your finger into the oximeter, your nail surface must be upward. Finger pulse oximeter is an economical and accurate method to detect pulse rate and blood oxygen saturation by finger. Small size, easy to carry. Suitable for daily use, measuring your health at any time. Features: Muti-function: Digital pulse oximeter can be used to measure pulse rate, blood oxygen saturation levels accurately. Easy to Use: Accurate and reliable, one button operation, just clip it on to your finger and turn it on at the press of a button. Automatic power off after 8s when not in use. Quicker Display: The oximeter adopt advanced sensing technology, the test results will be displayed on the screen after 5s. No need to wait. Easy to Read: Low power consumption, LED display, 2 directions can be adjusted for conveniently reading. Even the elderly, also can accurately and easily read the values. Widely Applicable: Lightweight and portable, widely used at home, personal care in sports or travel. Measuring your health at any time. Specifications: Model: SO711 Color: white Material: Plastic Display mode: LED display Blood oxygen measurement range: 70 ~ 99% (resolution is 1%) Blood oxygen measurement accuracy: 70 ~ 99%, ± 2%-± 3%, less than 70% undefined Pulse rate measurement range: 30 ~ 250BPM (resolution is 1BPM) Pulse rate accuracy: ±2bpm or ±2% to the maximium Battery: 2 * AAA Batteries (Not included) Working voltage: DC 3.0V Product size: 5.5 * 3.2 * 3cm Package size: 7.5 * 5.5 * 4cm Package Weight: 35g Packing List: 1 x Oximeter 1 x English User Manual 1 x Oximeter 1 x English User Manual