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GoPro HERO4 Silver Action Camera & Free $50 Amazon Gift Card: $400
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GoPro Hero4 Silver Review | PCMag
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GoPro Hero4 Silver Review: King of the Action Cam Mountain | Digital Trends
Amazon.com : Nechkitter 60m Dive Protective Housing Case for GoPro Hero 5 Session Hero 4 Session Hero Session, High Transmission Waterproof Housing Case : Electronics
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GoPro Hero4 Black review: Smooth 4K video that's still the best in the category - CNET
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Amazon.com : GoPro Hero 4 Silver Edition 12MP Waterproof Sports & Action Camera Bundle with 2 Batteries : Electronics
GoPro HERO4 Silver vs HERO5 Black | GoPro Comparison Review
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