The Concord Topaz Fingertip Pulse Oximeter Combo gets you going now. Designed for personal use by individuals, and athletes. If you need to monitor your oxygen and pulse rate, the Topaz is for you. The Topaz comes with everything you need, batteries, carrying case, around-the-neck lanyard, and a shock resistant protective rubber cover, all in a reusable, custom foam-padded box. Not intended for medical use and is perfect for use in sports/aviation. Backed by a full 2-year warranty, you can be confident that this oximeter will last.