LOADED WITH ACCESSORIES - Includes 2 x AAA BATTERIES, allowing the pulse oximeter to be used right out of the box; a SILICONE COVER to protect from dirt and physical damage; and a LANYARD for convenience. Comes with a 12-month WARRANTY and USA based technical phone support.FULL SPO2 VALUE - The ONLY LED pulse oximeter that can read and display SpO2 up to 100%.ACCURATE AND RELIABLE - Accurately determines your SpO2 (blood oxygen saturation levels), pulse rate and pulse strength in 10 seconds and displays it conveniently on a large digital LED display.SPORTS/HEALTH ENTHUSIASTS - For sports enthusiasts like mountain climbers, skiers, bikers, and anyone needing to monitor their SpO2 and pulse rate. The pulse oximeter LED display faces the user for an easy read.ACCOMODATES WIDE RANGE OF FINGER SIZES - Finger chamber with SMART Spring System. Works for ages 12 and above.