Elevate your fitness monitoring with the COROS Heart Rate Monitor armband, engineered specifically for accurate heart rate tracking during sports and activities. Designed for a large arm size (9.4 to 16.9 inches), this armband features a soft, breathable fabric band that offers superior comfort compared to traditional chest straps and allows for quick, hassle-free cleaning by removing the sensor. Its flexible fit ensures the band stays securely in place with an adjustable buckle, providing an ideal tension for every workout. Equipped with an advanced sensor, carefully protected under a scratch-resistant cover, COROS delivers precise and reliable heart rate data to keep your training focused and distraction-free. Enjoy an impressive battery life of up to 38 hours on a single charge, with fast 2-hour recharging via magnetic cable. The smart wear detection powers the device on/off automatically and ensures seamless connections with up to three devices simultaneously, including sports watches, trainers, and fitness apps. Perfectly integrates with COROS watches and a wide range of fitness equipment, making it your ultimate workout companion.