The Wellue OxySmart™ Bluetooth Fingertip Pulse Oximeter(Mode:PC-60NW) is intended for measuring the pulse rate and functional oxygen saturation (SpO2) through the finger, and indicating the pulse intensity by a bar-graph display. It's great for mountain climbers, bikers, trainers, aviators, and general sports enthusiasts to spot check SpO2 on the fly. It is not designed to diagnose any medical condition or to be used for any medical application.