NONIN ONYX 9550 pulse oximeter

Check your heart rate and blood-oxygen saturation levels simply and quickly with the Nonin Onyx 9550 Pulse Oximeter. The same pulse oximeter trusted by doctors for over 10 years! Just place the Nonin 9550 pulse oximeter over your fingertip. It will automatically turn itself on and light up a display, providing you with instant, real-time info on your heart-rate and blood-oxygen saturation levels. When you take the Nonin 9550 Pulse Oximeter off of your finger, it automatically turns itself off after 7 seconds, saving the battery life.