?Warm Tips?This device is not a medical device, This device is for sports or aviation use only, not for medical use. Perfect for sports enthusiasts, climbers, skiers, cyclists, pilots, etc. ?High Quality?Oximeter is small and lightweight (30 grams) with a lanyard for easy portability and a bright LED display for clear reading in dark places or in bright sunlight. ?Easy to Use?The Finger Oximeter is designed with one-button controls that allow you to measure your blood oxygen level in 8 seconds by simply placing your finger in the hole. ?Lightweight and Portable?The pulse ox oximeter is very small and portable and fits all finger sizes. It automatically shuts off after 8 seconds of finger removal, so you can measure oxygen saturation anywhere, anytime. ?Accurate and Reliable?Oximeter accurately measures your SpO2, pulse rate, and pulse strength in less than 8 seconds and conveniently displays them on an LED screen.