By Leslie Katz Stick this Blast Motion precision motion sensor on your GoPro to capture performance metrics and add them to your action footage. Why? To improve your performance — and brag, of course.

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Source:: http://cnet.com.feedsportal.com/c/34938/f/645093/s/41c7b21d/sc/4/l/0L0Scnet0N0Cnews0Ccrave0Egiveaway0Eblast0Eactioncam0Efor0Eamplified0Eextreme0Esports0Efootage0C0Tftag0FCAD590Aa51e/story01.htm