The Matrix Fitness 1000443389 Elliptical Heart Sensor Set Grip Right CB is designed to monitor heart rate through direct hand contact. This product is a right-side grip sensor set used on compatible elliptical machines to detect pulse signals while the user exercises. It works by sensing electrical impulses from the hands and transmitting the data to the console for real-time display.... https://www.wholetoolbox.com/matrix-fitness-1000443389-elliptical-heart-sensor-set-grip-right-cb