The Fitbit Charge is an everyday fitness tracker that connects to smartphones to receive call notifications. With a 7-10 day battery life. the Charge can continually monitor various health markers like sleep time. calories burned. and floors climbed without needing to be constantly recharged. The Charge also works with a smartphone app and website to provide you with an all inclusive tool to take control and improve your health. Using bluetooth technology. the Charge also pairs with your smartphone to alert you of incoming calls. The Fitbit Charge is currently retailing for $129.95.