Wearing this will help whip you into shape

Monitoring every step you take without any assistance from The Police, Fitbit Flex's a slick new silicone wristband that -- more conveniently than their wildly popular, bulkier, belt-affixing dongle -- measures daily distance traveled, calories burned, and hours/quality of sleep by auto-syncing with a dedicated smartphone app. Plus it also serves as a silent, vibrating alarm!

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