Heart Rate Ring. Accurately monitor your heart rate at a glance. Your heart rate is one of the four vital signs and this ring makes it incredibly easy to monitor. The infrared technology provides accurate and continuous feedback, whether you’re at work, at play, or at rest. Our Heart Rate Ring features include : heart rate monitor, stopwatch, clock and min/max target heart rate with alert. It comes with one lithium battery and size-reducing insert. One size fits most. Advanced infrared technology Our Heart Rate Ring’s infrared technology and micro controller provide a simple and accurate way to monitor your heart rate. The unit is lightweight, easy to wear and designed to give you the best results in most types of heart rate measurement applications. Resting heart rate can be an indicator of overall fitness. A low resting heart rate can indicate an efficient cardiovascular system. The Heart Rate Ring makes finding your resting heart rate easyhere’s how : Before you get out of bed in the morning, slip the Heart Rate Ring onto any finger Do this for five consecutive days Add the five numbers together and divide by five to calculate the average Comfortable, convenient and easy to use Completely self-contained so you can just slip the Heart Rate Ring on your finger and go–no wires or straps to get in your way. The continuous readout lets you check your heart rate without interrupting your workout or walk. NOTE : Item is not a Medical Device. NOTE : At this time we are unable to provide online customers with a specific color choice for this product. When ordering “Assorted,” we will ship either Red, Black, Blue or Pink. To obtain a specific color choice for this product, please visit a Brookstone store near you. NOTE : This is a personal care item, and is not returnable.