The Advantage 2200 Digital Fingertip Pulse Oximeter is an easy to use oximeter that works great at home, for athletics, or even for aviation applications. It is easy to use and serves a variety of functions. Each pulse oximeter can fit fingers between .3 and .8 inches. Readings are displayed on a large and easy to read LCD screen that has two modes. In addition this oximeter is lightweight and can be taken with you wherever you go.