Nonin Onyx II All in 1 Fingertip PulseOx

Nonin Onyx II all-in-1 Fingertip PulseOx is the world's smallest fingertip oximerter. It is simple to operate, small, and durable; it even past the US Army and US Air Force aeromedical certification for use in helicopters. The Onyx II can go anywhere: on a lanyard, in a carrying case, or in your pocket/purse. It weighs less than two ounces. AAA batteries are also long-lasting with this product, allowing for 2500 spot-checks or 21 hours of continuous usage.