The Protech fingertip pulse oximeter features the latest technology for measuring oxygen saturation and heart rate. With an advanced fingertip design that easily reads varying finger sizes, Protech is a convenient and accurate solution to your pulse oximetry needs. Ultra clear LED screen Multiple display parameters (SpO2, PR, bar graph) Accurate, affordable and dependable Over 30 hours of operating time on two AAA batteries Convenient lanyard for easy portability Auto-Power Off 1 Year Limited Warranty

Kline Medical Supply has this on its website for $67.49 placing the protech Pulse oximeter at your fingertips. 

 http://www.medicalsupplycart.com/Fingertip-Pulse-Oximeter.aspx