Many know I suffer from COPD. I like knowing what my SpO2 level is at times. Due to medication, which raises my pulse, knowing When I am active it does help so I can adjust my activity as needed. I was very pleased with this and even checked it when the Dr. used the Medical one at the office. They ran neck and neck as to levels. From a sports point of view, this will also be quite handy for tracking while running, cycling, and such. Accurately reports pulse and O2 level. It has an easy readable screen and is well built. It shuts itself down within a few seconds when you take your finger. A simple and easy tool to monitor your health. I have tried several nd this meter is one of the top two I have tried based on dependability.