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Misfit Shine is a small wearable sensor that tracks how much exercise the wearer is getting each day (video). The sensor is housed in a durable aluminum body about the size of a quarter. It can track walking, swimming, and bicycling. Tiny LEDs indicate how close the wearer is to their daily activity goal, and progress can also be monitored on a smartphone app. The tracker syncs wirelessly with a smartphone simply by placing it on the phone’s screen. Misfit Shine is being developed by San Francisco-based Misfit Wearables. They are pre-selling the device on Indiegogo for delivery in spring 2013.
An elegant wireless activity tracker - the Misfit Shine story - YouTube
http://www.youtube.com/watch?feature=player_embedded&v=1RL8PjiOoGI#!