Nike Triax C3 Heart Rate Monitor Watch

For sale is this Nike Triax C3 Heart Rate Monitor featuring Chronograph, Stopwatch, and ECG Heart Rate. You can spend more time on your pace and less time keeping track of it with the Nike Running collection watches. Designed for runners, strong laps are easy and the large numbers are easy to read when you're on the move. It has an adjustable band up to 8.25" so can be worn by a man or a woman. I don't know if it has ever been worn. I bought it at an estate sale and do not know the history.