GoPro's Hero4 cameras offer 30 fps 4K shooting or touchscreen controls | Engadget
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Amazon.com : GoPro Hero4 Black : Electronics
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Amazon.com : GoPro Hero4 Black : Electronics
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Used GoPro HERO 4 Black | MPB
Used GoPro HERO 4 Black | MPB
Amazon.com : GoPro Hero4 Black : Electronics
GoPro Hero4 Black review: Smooth 4K video that's still the best in the category - CNET
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Amazon.com : GoPro Hero4 Black : Electronics
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