Sejoy Pulse Oximeter Fingertip with Sound Reminder, Smart Blood Oxygen Saturation Monitor with Carrying Bag, Batteries, and Lanyard - XM-111

EASY TO USE - Taking a reading is easy, just clip it onto your fingertip and one-click on the button to turn it on. Auto Power Off within 15 seconds after the finger left ACCOMMODATES WIDE RANGE OF FINGER SIZES - Finger chamber with SMART Spring System. Works for ages 3 and above HEALTH/EXERCISE ENTHUSIASTS-The oxygen monitor is only for sport or aviation use, or anyone interested in measuring their SpO2 and PR. It is ideal for use during high-endurance sports activities such as mountain climbing, running, biking, etc