Train more effectively with Garmin's Premium Heart Rate Monitor. The strap is soft, with nearly infinite size adjustment, ensuring a secure, comfortable fit across your chest. This ANT+ monitor wirelessly transmits your heart rate to your compatible device for instant feedback on how hard you're working. It's optimized for use in crowded areas, like gyms and group riding, so it will only pick up your signal. And, the plastic heart rate module easily unsnaps from the soft strap, allowing for hassle-free laundry.