COROS Heart Rate Monitor | Comfort and Accuracy in Every Workout

38 hours of active tracking and recharges in less than two hours. No buttons, no menus. Built-in wear detection connects your heart rate monitor to your watch the moment you put it on. Simultaneously pair with up to three devices, including non-COROS watches and other Bluetooth-compatible indoor trainers, bike computers, and more. Optical heart rate sensors work by using light to measure blood flow in capillaries beneath the skin. The top of your wrist is a convenient place for a watch, but is a challenging location for even the best sensors. Wearing on the upper arm offers our optical sensor an optimal amount of blood flow to gather heart rate data with accuracy equivalent to that of a traditional chest strap. Train smarter with every workout. The COROS HR Monitor gives you incredible comfort, automatic pairing, and accurate data to help better understand your effort.Train smarter with every workout. The COROS HR Monitor gives you incredible comfort, automatic pairing, and accurate data to help better understand your effort.