Fitbit Flex -Barely used.
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A slim, stylish device that tracks all-day activity like steps, distance, calories burned and active minutes. Wear it at night to measure your sleep quality and wake with a silent, vibrating alarm. Day or night, Flex fits comfortably around your wrist, is water-resistant, and has a 5-day battery life. It also syncs to computers and 150+ leading smartphones, so you can access your stats anywhere and see your progress in charts and graphs.