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. FULL SPO2 VALUE - The ONLY LED pulse oximeter that can read and display SpO2 up to 100%. 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. 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. Product Description The Zacurate Pro Series 500DL fingertip pulse oximeter is manufactured according to the CE and FDA standards set for pulse oximeter designed for sports enthusiasts, pilots or anyone who wants to obtain their SpO2 (blood oxygen saturation levels) and PR (Pulse Rate) on the go. The LED display now faces the user so that the user can read it easily. We have upgraded internal hardware and software components of the pulse oximeter. For example: the pulse oximeter can now display SpO2 up to 100%! Taking a reading is easy, just clip it on to your finger and turn it on at the press of a button. The large LED display makes viewing the results a snap. Its small size makes it easy to carry around and a lanyard is also included for added convenience. Comes with 2 AAA batteries and a silicon cover to protect your pulse oximeter from dirt and damage. Zacurate is a registered trademark of USPTO. We will actively and aggressively pursue any parties who infringe on our intellectual property rights to the maximum extent allowed by the law. Beware of Imitation, Buy Original. Zacurate Pulse oximeter is designed in USA. This device is for Sports Aviation use only and is not a medical device.