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RFTC: Side-by-Side Comparison of GoPro Hero 4, GoPro Hero 3+, GoPro Hero 2 and Mobius B - YouTube
GoPro CHDHX-401 HERO4 Silver And Black 4K Action Camera - Walmart.com
GoPro HERO4 Action Camera - Silver for sale online | eBay
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V5.0 Dome Port for GoPro Hero 4 / 3+ / 3 | Professional Water Housings– GDome
