【Highly Accurate Reliable】Measures the oxygen concentration in the blood with a minimum deviation of +/-2% and measures the pulse rate with a minimum deviation of +/-2 bpm. 【Reliable OLED Display】Accurately determine your SpO2 (blood oxygen saturation levels) and pulse rate and strength in 4 directions, 6 display modes, and 10 levels of adjustable brightness. 【Easy to Use】Our pulse monitor is easy to use and has an efficient One Button Operation. Our SPO2 Sensor will spot check and display in real time SpO2, PR, Pulse bar graph which great for checking your pulse signal strength. 【Out of Box Ready】Our portable oxygen saturation machine comes with Instruction manual,Neck lanyard (detachable and adjustable length) you'll be ready to use your portable oxygen sensor right out of the box. 【Suitable for All Ages】Our oxygen saturation finger monitor can be used as a pediatric pulse oximeter for kids and children as well as a blood oxygen monitor for adults.