Designed to seamlessly fit into your life and provide useful, real time information to help you reach your health and fitness goals, the Jawbone UP24 fitness tracker is a thoughtful combination of engineering and design that's just like wearing an intelligent computer wrapped around your wrist. . Tri axis accelerometer tracks your movement throughout the day and monitors your sleep at night. While the wristband tracks your movement and sleep in the background, the UP app displays your data and lets you add other information like meals and mood and provides insight to keep you moving forward. Smart Alarm helps you wake up feeling refreshed set up to four alarms, and UP24 analyzes your sleep cycle to wake you with a gentle vibration at the most ideal time within a 10 , 20 or 30 minute window or at an exact time that you specify. UP24 is constantly connected, providing real time data and feedback through the UP app to keep you on track and motivated. Compatible with other fitness apps so you can track your weight, map your runs or bike rides, access extensive food libraries, and more data from other apps is seamlessly integrated into your UP feed, lifeline, and trends. Data syncs automatically and wirelessly to your device via Bluetooth Smart connectivity. 32mAh Li ion battery lasts up to 7 days per charge and recharges via USB cable in just 80 minutes. Two single color LED indicator lights and vibrating motor indicate power, charge states, and current status. Hypoallergenic TPU rubber band with nickel plated TR90 nylon cap is splash resistant but not submergible avoid excess bending.