The Digimode Pulse Oximeter is designed for joggers, cyclist, athletes, gym exercisers, hikers, and other sport activity enthusiasts who want to monitor their SpO2 on the go. This portable device measure your blood oxygen levels and pulse strength in a matter of seconds. It is simple and easy to use. Clip it on to your finger, power it on, and press the read button. Large led display screen show the results clearly with accurate readings. Open and close spring clip designed to fit most finger sizes. Convenient to carry around when you are ready to use.