A pulse oximeter, also known as a pulse ox, is a medical device which is used to take measurements of blood oxygen saturation levels and pulse rates on the spot. A pulse oximeter is widely used for the monitoring of various cardiac and respiratory health related conditions. The great part of a finger oximeter is its small, portable size, and great accuracy. Due to its size and it running on standard batteries, one can easily carry it in their pocket or around their neck via a lanyard. The benefits of a finger oximeter is that is greatly reduces visits to the clinic for daily or weekly blood oxygen saturation readings.