The CMI Health PC-66L is a Digital Pulse Oximeter that monitors and measures Pulse Rate, Sp02, and Perfusion Index. Measuring this health data rapidly and accurately allows users to easily assess and make vital health related decisions in real time. PC-66L is our rechargeable pulse oximeter, making it a perfect fit for those who need a medical device for continuous health monitoring. That being said, the PC-66L can of course also be used in a spot-checking capacity. The pulse oximeters durability, accuracy, and highly competitive price point, addresses one of the most common challenges associated with purchasing any health monitoring device.Finding an affordable, medical grade device you can trust.