Elevate your fitness journey with this cutting-edge heart rate monitor featuring a rechargeable lithium battery and a convenient LED charging indicator. Seamlessly sync your device with the Echelon Fit App to track your performance in real-time. The innovative HR Zone Light changes color according to your heart rate, keeping you motivated and informed during workouts. Compatible with iPhones 4s and later, as well as Android devices supporting Bluetooth 4, it offers wide connectivity. Enjoy a generous wireless range of up to 32.8 feet thanks to the latest Bluetooth Smart Technology, ensuring freedom and flexibility while training. Experience accurate, smart, and stylish fitness tracking designed to keep you in the zone and on the path to your goals.