2.
0 inches (H) x 2. Fingertip Pulse Oximeter Portable Finger Blood Oxygen SpO2 PR Heart Rate Monitor Dimensions: 1. 4. Fingertip Pulse Oximeter Portable Finger Blood Oxygen SpO2 PR Heart Rate Monitor Suitable for sports enthusiasts like mountain climbers skiers bikers aviators or anyone is interested in measuring their SpO2 and pulse rate.