The slim and stylish Fitbit Flex Wireless Activity Sleep Wristband tracks your sleep patterns, steps taken, distance traveled, calories burned, and active minutes to get you on track for a healthier lifestyle. Set fitness goals and then watch the LED lights to monitor your progress, helping keep you on right track. The sleep monitor shows how long and how well you're sleeping, and then the silent alarm gets you up in the morning without disturbing anyone else who might be sharing your bed. Sync wirelessly to your computer or smartphone to view easy to read charts and graphs, as well as fitness milestones and badges earned as you strive towards your overall fitness goals. The Flex has a five day battery life to keep things consistent then only takes roughly two hours to charge, making sure you never miss a step. Rain, splash, and sweat proof, the Flex won't fail to keep you active even when the weather isn't ideal.