ChoiceMMed Black Finger Pulse Oximeter - Blood Oxygen Saturation Monitor Great as SPO2 Pulse Oximeter - Portable Oxygen Sensor with Included Batteries - O2 Saturation Monitor with Carry Pouch 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 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 a durable protective pouch (with loop for belt), Instruction manual, 2 AAA alkaline batteries, 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. NOTE: This device is for Sports and Aviation use only and not intended for medical use. Its great for mountain climbers, bikers, trainers, aviators, and general sport enthusiasts to spot check SpO2 on the fly.