Check pre- and post-workout rates with this pulse tracker. Its finger-grip sensor provides instant results with the push of a button, and the bright OLED display has large numerals for enhanced viewing. This Bluestone pulse oximeter has a carrying case and lanyard, so you can access your health readings anytime. Keep track of important vital signs on the go by using this fingertip oximeter. Features a big, bright OLED display that is easy to read. Dimensions: 2. 5"H x 1. 3"W x 1. 5"D. Runs on two AAA alkaline batteries (not included). Includes protective case and lanyard. Measure your heart rate or oxygen levels after a run or workout to make sure you don't overwork yourself and stay safe. Get quick and accurate readings by using just one button. ⚠ WARNING: Cancer and Reproductive Harm - www. P65Warnings. ca. gov. Track your heart rate and oxygen levels with this Bluestone fingertip oximeter.