The Fitbit Surge is the ultimate fitness tracker and smart watch in one. With a 7 day battery life, the Charge can continually monitor various health markers like your heart rate, sleep time, calories burned, distance and pace without needing to be constantly recharged. The Surge also works with a smartphone app and website to provide you with an all inclusive tool to take control and improve your health. In addition to the fitness tracking, the Surge syncs with your mobile device to notify you about incoming calls and text messages. The Bluetooth technology also allows you to control your music right from your wrist.